SKU: 17047468522

Comp Cams Mutha Thumpr, 291T HR-7: Camshaft Kit

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Description

Comp Cams Mutha Thumpr, 291T HR-7: Camshaft KitMutha Thumpr", 291T HR 7: Camshaft Kit Hydraulic Roller: High performance street strip, needs 9: 1 CR, 2400+ stall, intake, gears, and headers, rough idle Specifications Lifter Type: Hydraulic Roller Lifter Engine Family: Chevrolet 396 454 c. i. 8 CYL. 1965 1996 Cam Family: Thumpr" Retro Fit Hydraulic Roller Camshafts RPM Range: 2000 to 5800 Valve Timing: 0. 006 Lobe Separation: 107 Intake Centerline: 102 Valve Lash: Hyd.(Intake) Hyd.(Exhaust)

Mutha Thumpr", 291T HR-7: Camshaft Kit

Hydraulic Roller: High performance street/strip, needs 9:1 CR, 2400+ stall, intake, gears, and headers, rough idle

Specifications

Lifter Type: Hydraulic Roller Lifter

Engine Family: Chevrolet 396-454 c.i. 8 CYL. 1965-1996

Cam Family: Thumpr" Retro-Fit Hydraulic Roller Camshafts

RPM Range: 2000 to 5800

Valve Timing: 0.006

Lobe Separation: 107°

Intake Centerline: 102°

Valve Lash: Hyd.(Intake)/ Hyd.(Exhaust)

Duration: 291(Intake)/ 311(Exhaust)

Duration @ .050" Lift: 235(Intake)/ 249(Exhaust)

Valve Lift: 0.558(Intake)/ 0.542(Exhaust)

Lobe Lift: 0.328(Intake)/ 0.319(Exhaust)



Vehicle Fitments:

Year Make Model Submodel
1965 - 1975 Chevrolet Bel Air Base
1965 - 1972 Chevrolet Biscayne Base
1973 - 1974 Chevrolet Blazer Base
1969 - 1972 Chevrolet Brookwood Base
1978 - 1980 Chevrolet C10 Big Ten
1975 - 1980 Chevrolet C10 Silverado, Custom, Scottsdale, Cheyenne, Custom Deluxe
1968 - 1974 Chevrolet C10 Pickup Base
1968 - 1974 Chevrolet C10 Suburban Base
1975 - 1980 Chevrolet C10 Suburban Custom Deluxe, Scottsdale, Silverado
1990 - 1991 Chevrolet C1500 Base
1990 - 1993 Chevrolet C1500 Cheyenne, 454 SS, WT, Silverado
1990 - 1992 Chevrolet C1500 Scottsdale
1986 Chevrolet C20 Base
1975 - 1986 Chevrolet C20 Cheyenne, Scottsdale, Silverado
1981 - 1986 Chevrolet C20 Custom
1975 - 1980 Chevrolet C20 Custom Deluxe
1981 Chevrolet C20 Deluxe
1968 - 1974 Chevrolet C20 Pickup Base
1968 - 1974 Chevrolet C20 Suburban Base
1981 - 1986 Chevrolet C20 Suburban Custom
1975 - 1980 Chevrolet C20 Suburban Custom Deluxe
1981 Chevrolet C20 Suburban Deluxe
1975 - 1986 Chevrolet C20 Suburban Scottsdale, Silverado
1991 - 1996 Chevrolet C2500 Base, Silverado, Cheyenne
1993 Chevrolet C2500 Custom, 400 SS
1991 - 1992 Chevrolet C2500 Scottsdale
1994 - 1995 Chevrolet C2500 WT
1992 - 1996 Chevrolet C2500 Suburban Base
1995 - 1996 Chevrolet C2500 Suburban LS, LT
1992 - 1994 Chevrolet C2500 Suburban Silverado
1975 - 1982 Chevrolet C30 Base
1975 - 1981 Chevrolet C30 Cheyenne
1981 - 1986 Chevrolet C30 Custom
1975 - 1980 Chevrolet C30 Custom Deluxe
1981 Chevrolet C30 Deluxe
1975 - 1986 Chevrolet C30 Scottsdale, Silverado
1968 - 1974 Chevrolet C30 Pickup Base
1994 - 1996 Chevrolet C3500 Base
1988 - 1992 Chevrolet C3500 Scottsdale
1988 - 1996 Chevrolet C3500 Silverado, Cheyenne
1967 - 1972 Chevrolet Camaro SS, Base, Z28, RS
1966 - 1974 Chevrolet Caprice Base
1973 - 1976 Chevrolet Caprice Classic
1976 Chevrolet Caprice Classic Landau, Classic Estate
1975 - 1976 Chevrolet Caprice Classic Sport
1973 - 1974 Chevrolet Caprice Estate
1975 Chevrolet Caprice Estate Wagon
1967 - 1968 Chevrolet Chevelle 300
1967 - 1969 Chevrolet Chevelle 300 Deluxe
1967 - 1972 Chevrolet Chevelle Concours
1969 - 1972 Chevrolet Chevelle Concours Estate, Greenbrier
1965 - 1973 Chevrolet Chevelle Deluxe
1968 - 1972 Chevrolet Chevelle Nomad, Malibu
1965 - 1972 Chevrolet Chevelle SS, Base
1968 Chevrolet Chevy II Nova
1967 - 1974 Chevrolet Corvette Base
1966 - 1975 Chevrolet El Camino Base
1975 Chevrolet El Camino Classic
1968 - 1974 Chevrolet El Camino Custom
1968 - 1975 Chevrolet El Camino SS
1969 - 1970 Chevrolet Estate Base
1996 Chevrolet Express 3500 LS, Base
1973 - 1974 Chevrolet G10 Van Sportvan, Base
1976 Chevrolet G20 Sportvan, Chevy Van, Beauville
1973 - 1974 Chevrolet G20 Van Base, Sportvan
1975 - 1996 Chevrolet G30 Hi-Cube, Beauville, Sportvan, Chevy Van
1973 - 1974 Chevrolet G30 Van Base, Sportvan
1965 - 1976 Chevrolet Impala Base
1976 Chevrolet Impala Custom Landau, S
1975 - 1976 Chevrolet Impala Sport, Custom
1965 - 1967 Chevrolet Impala SS
1976 - 1980 Chevrolet K10 Cheyenne, Custom Deluxe, Scottsdale, Silverado
1968 - 1974 Chevrolet K10 Pickup Base
1968 - 1974 Chevrolet K10 Suburban Base
1976 - 1980 Chevrolet K20 Scottsdale, Custom Deluxe, Cheyenne, Silverado
1968 - 1974 Chevrolet K20 Pickup Base
1968 - 1974 Chevrolet K20 Suburban Base
1985 Chevrolet K20 Suburban Silverado, Custom, Scottsdale
1994 - 1996 Chevrolet K2500 Base
1991 - 1996 Chevrolet K2500 Cheyenne, Silverado
1991 - 1992 Chevrolet K2500 Scottsdale
1994 - 1995 Chevrolet K2500 WT
1992 - 1996 Chevrolet K2500 Suburban Base
1995 - 1996 Chevrolet K2500 Suburban LT, LS
1992 - 1994 Chevrolet K2500 Suburban Silverado
1977 - 1981 Chevrolet K30 Cheyenne
1981 - 1986 Chevrolet K30 Custom
1977 - 1980 Chevrolet K30 Custom Deluxe
1981 Chevrolet K30 Deluxe
1977 - 1986 Chevrolet K30 Scottsdale, Silverado
1968 - 1974 Chevrolet K30 Pickup Base
1994 - 1996 Chevrolet K3500 Base
1988 - 1996 Chevrolet K3500 Cheyenne, Silverado
1988 - 1992 Chevrolet K3500 Scottsdale
1976 Chevrolet K5 Blazer Base
1976 - 1978 Chevrolet K5 Blazer Cheyenne
1977 - 1978 Chevrolet K5 Blazer Custom Deluxe
1978 Chevrolet K5 Blazer Silverado
1969 - 1972 Chevrolet Kingswood Estate, Base
1973 - 1975 Chevrolet Laguna Base
1973 Chevrolet Laguna Estate
1975 Chevrolet Laguna S3
1974 Chevrolet Laguna Type S-3
1966 - 1975 Chevrolet Malibu Base
1974 - 1975 Chevrolet Malibu Classic
1975 Chevrolet Malibu Classic Estate
1973 - 1974 Chevrolet Malibu Estate
1970 - 1974 Chevrolet Monte Carlo Base
1973 - 1974 Chevrolet Monte Carlo Landau
1973 - 1975 Chevrolet Monte Carlo S
1969 - 1972 Chevrolet Nova Base
1973 Chevrolet P10 Van Base
1976 - 1979 Chevrolet P20 Base, Step-Van
1970 - 1973 Chevrolet P20 Van Base
1975 - 1997 Chevrolet P30 Base
1975 - 1990 Chevrolet P30 Step-Van
1970 - 1974 Chevrolet P30 Van Base
1988 Chevrolet R20 Cheyenne
1987 - 1988 Chevrolet R20 Scottsdale, Silverado, Custom Deluxe
1987 Chevrolet R20 Suburban Custom Deluxe
1987 - 1988 Chevrolet R20 Suburban Silverado, Scottsdale
1989 Chevrolet R2500 Cheyenne, Silverado, Scottsdale
1989 - 1991 Chevrolet R2500 Suburban Scottsdale, Silverado
1988 Chevrolet R30 Cheyenne
1987 - 1988 Chevrolet R30 Custom Deluxe, Silverado, Scottsdale
1989 - 1991 Chevrolet R3500 Cheyenne, Silverado
1989 - 1990 Chevrolet R3500 Scottsdale
1969 - 1972 Chevrolet Townsman Base
1987 Chevrolet V20 Suburban Custom Deluxe
1987 - 1988 Chevrolet V20 Suburban Scottsdale, Silverado
1990 Chevrolet V2500 Suburban Silverado, Scottsdale
1988 Chevrolet V30 Cheyenne
1987 - 1988 Chevrolet V30 Custom Deluxe, Silverado, Scottsdale
1989 - 1990 Chevrolet V3500 Scottsdale
1989 - 1991 Chevrolet V3500 Silverado, Cheyenne
1972 - 1979 Excalibur Phaeton Base
1975 - 1978 GMC C15 Base, Sierra Grande, High Sierra, Sierra Classic
1977 - 1978 GMC C15 Heavy Half
1977 GMC C15 Indy Hauler
1978 GMC C15 Street Coupe
1975 - 1978 GMC C15 Suburban Base, Sierra Grande, High Sierra, Sierra Classic
1968 - 1974 GMC C15/C1500 Pickup Base
1968 - 1974 GMC C15/C1500 Suburban Base
1979 - 1980 GMC C1500 Street Coupe, Heavy Half, Sierra Grande, High Sierra, Base, Sierra Classic
1979 - 1980 GMC C1500 Suburban Sierra Classic, Sierra Grande, Base, High Sierra
1975 - 1978 GMC C25 Sierra Grande, High Sierra, Sierra Classic, Base
1975 - 1978 GMC C25 Suburban Sierra Classic, High Sierra, Base, Sierra Grande
1968 - 1974 GMC C25/C2500 Pickup Base
1968 - 1974 GMC C25/C2500 Suburban Base
1979 - 1986 GMC C2500 Base, Sierra Classic, High Sierra
1979 - 1982 GMC C2500 Sierra Grande
1991 - 1996 GMC C2500 Sierra SLE
1994 - 1996 GMC C2500 Sierra SLT, Sierra SL
1991 - 1993 GMC C2500 Sierra SLX, Sierra
1979 - 1996 GMC C2500 Suburban Base
1979 - 1986 GMC C2500 Suburban Sierra Classic, High Sierra
1979 - 1982 GMC C2500 Suburban Sierra Grande
1992 - 1996 GMC C2500 Suburban SLE
1995 - 1996 GMC C2500 Suburban SLT
1975 - 1978 GMC C35 Sierra Classic, Base, Sierra Grande, High Sierra
1968 - 1974 GMC C35/C3500 Pickup Base
1979 - 1986 GMC C3500 High Sierra, Sierra Classic, Base
1979 - 1982 GMC C3500 Sierra Grande
1988 - 1996 GMC C3500 Sierra SLE
1994 - 1996 GMC C3500 Sierra SLT, Sierra SL
1988 - 1993 GMC C3500 Sierra, Sierra SLX
1975 - 1976 GMC G25 Rally, Rally STX, Vandura
1976 GMC G35 Rally STX, Magnavan, Vandura Special, Rally Camper Special, Vandura, Rally
1974 GMC G35/G3500 Van Base
1973 - 1974 GMC G35/G3500 Van Rally, Vandura
1988 GMC G3500 Rally Custom
1988 - 1996 GMC G3500 Rally STX, Vandura Special, Rally, Vandura, Magnavan, Rally Camper Special
1973 - 1976 GMC Jimmy Base
1976 GMC Jimmy High Sierra, Sierra Classic, Sierra Grande
1976 GMC K15 High Sierra, Base, Sierra Classic, Sierra Grande
1968 - 1974 GMC K15/K1500 Pickup Base
1968 - 1974 GMC K15/K1500 Suburban Base
1979 - 1980 GMC K1500 Sierra Grande, Base, Sierra Classic, High Sierra
1976 - 1978 GMC K25 Base, Sierra Grande, High Sierra, Sierra Classic
1976 - 1977 GMC K25 Suburban Base, High Sierra, Sierra Grande, Sierra Classic
1968 - 1974 GMC K25/K2500 Pickup Base
1968 - 1974 GMC K25/K2500 Suburban Base
1994 - 1996 GMC K2500 Sierra SL, Sierra SLT
1991 - 1996 GMC K2500 Sierra SLE
1991 - 1993 GMC K2500 Sierra SLX, Sierra
1992 - 1996 GMC K2500 Suburban SLE, Base
1995 - 1996 GMC K2500 Suburban SLT
1968 - 1974 GMC K35/K3500 Pickup Base
1979 - 1986 GMC K3500 High Sierra, Base, Sierra Classic
1979 - 1982 GMC K3500 Sierra Grande
1994 - 1996 GMC K3500 Sierra SL, Sierra SLT
1988 - 1996 GMC K3500 Sierra SLE
1988 - 1993 GMC K3500 Sierra, Sierra SLX
1979 GMC P1500 Value Van, Base
1970 - 1971 GMC P25/P2500 Van Base
1975 - 1978 GMC P35 Value Van, Base
1970 - 1974 GMC P35/P3500 Van Base
1974 GMC P35/P3500 Van Motorhome
1979 - 1997 GMC P3500 Base
1979 - 1990 GMC P3500 Value Van
1987 - 1989 GMC R2500 Sierra Classic, High Sierra, Base
1987 - 1991 GMC R2500 Suburban Base
1987 GMC R2500 Suburban High Sierra
1987 - 1989 GMC R2500 Suburban Sierra Classic
1990 GMC R2500 Suburban SLE
1987 - 1991 GMC R3500 Base
1987 - 1989 GMC R3500 Sierra Classic, High Sierra
1990 - 1991 GMC R3500 SLE
1996 GMC Savana 3500 SLE, Base
1971 - 1975 GMC Sprint Base
1972 - 1974 GMC Sprint Custom
1975 GMC Sprint SP, High Sierra, Classic
1987 - 1991 GMC V3500 Base
1987 - 1989 GMC V3500 Sierra Classic, High Sierra
1990 - 1991 GMC V3500 SLE
1969 - 1974 Iso Grifo Base
Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 17047468522

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4.6 ★★★★★
Based on 14 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
West Palm Beach, US
★★★★★ 5
Great mouse
Number of Items: 1
Definitely reduces fatigue. Easy to use. Great response with less space needed for mouse movement. Stays charged for months you actually forget to charge it, ask me how I know :). I play video games with it and never have any issues with the movement and response time of mouse. And since my car wreck where I broke my thumb this is the only mouse that gave me the same as before the wreck abilities to move and operate the mouse. Highly recommend. One very broken thumbs up :)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
T
Verified Purchase
Thisisnotmyname
Natrona Heights, US
★★★★★ 4
Experience after one year of usage
Number of Items: 1
I had mainly used a MX Master 2S before this and because of my heavy usage I did start to feel uncomfortable after a few hours of use every day and that's when I decided to purchase MX Vertical. Now after almost 9 months of usage this has become the mouse I use on a daily basis, completely replacing MX Master 2S. Comfort: It took me about a day or two to really get used to using it because of the positioning and ever since then my wrist has never felt any discomfort, literally. I don't have a mouse pad but because of the angle that my wrist is contact with the desk when I use it, this has never been a problem. What I also love about the ergonomic design is that my hand can actually just rest on it when not doing specific tasks, and it just fits my palm perfectly. Functionality: I don't use it for gaming so I can't comment on that. However, comparing it with my Master 2S, there are some very obvious disadvantages. If you use Excel sheets a lot, or anything that requires horizontal viewing, the scrolling option is terrible. You can set up the function key on Logi Options+ and I use the side buttons for scroll right+left mainly because how easy it was to use with the Master 2S's side scrolling buttons. It is not comparable at all. With Master 2s, horizontal scrolling is smooth and precise. With this, it's basically useless. There are sites that just aren't responsive to the side buttons and when they do, you can never get to the precise point you want. Huge disappointment with that because I don't really use the side buttons for anything else. There is also no scrolling control with the middle button unlike the Master 2S, so you can't really scroll vertically as fast as you can when using Master 2S either. However I do use the middle button sometimes to just do the job for me so I'm ok with its basic functionality. The top button is mainly used as a look-up button for me, so far its working pretty well and honestly it probably makes not much difference if they just completely take this button out for me. Maybe some people can find use in it as a switch for scrolling or mouse speed, or something else. Overall, the customizability of these buttons is very good, and depending on personal use, I can see it being very useful. Battery life: Battery life is fantastic, never had any problem with it yet. I haven't really kept track but with my heavy daily usage (probably 10+ hours with no intense gaming), it can usually go for more than a month. You can also use it while it's being charged. Durability: I have unfortunately knocked it over the desk a couple times on hard vinyl floor and there seems to be no problem with it at all. Before purchasing this I saw some comments about how it stopped functioning after being dropped to the floor and I was really worried about it. However that is not my case at all. It is very durable in my opinion and does its job perfectly even after dropping it a few times. Overall, extremely comfortable to use. It helped with my wrist pain tremendously and now I use it for hours without feeling any discomfort. The functionality is severely disadvantageous compared to Master 2s and 3s, and possibly other gaming mouses as well, but if you are here because of wrist pain, this is the right product.
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Reviewed in the United States on May 24, 2024
J
Verified Purchase
J. Ellis
Charlottesville, US
★★★★★ 5
Finally, a comfortable vertical mouse for guys with large hands!
Number of Items: 1
I've been using the Logitech MX Vertical Wireless Mouse for about 8 years now, and I love it. Any time I have to use a traditional mouse it's an uncomfortable disappointment. If you haven't used a vertical mouse yet, there are a couple things you need to know. First - this is just a normal mouse, but it's turned about 60-degrees to the right. This let's your hand rest on the mouse in the natural position your arm wants it to be in without any effort to rotate. Second - you will knock it over, repeatedly, for a few weeks. Because you're used to a mouse that's a just an inch and a half or so tall, your natural movement from keyboard to mouse is going to be interrupted by the height of the MX Vertical. In time, you will get used to this, but for a week or two, you will knock it over when moving to the mouse, and when moving back to the keyboard. Don't worry, your muscle memory will change and this will stop. Third - once you get used to using the MX Vertical, you won't want to use any other mouse. It's a dramatic change in ergonomics, and you will feel the strain your wrist and forearm are under any time you have to use a traditional mouse. There are other verticals that are also great, but as a guy with large hands, this is the best I've found. I have 4 of these now - one at my office, one at my dining room table, one at my desk, and one that travels in my backpack. I don't need all of these, but its handy having them where I need them. Another reason for this is the mouse can pair with 3 devices. I have different devices in each of these locations, so it's handy not having to re-pair when I move between locations. The MX Vertical fits my hand perfect, and all buttons are where my fingers and thumb are naturally positioned. I've dropped them, knocked them down, bumped and tossed them and they keep on working properly, so from a durability standpoint, this will last. It's easy to pair with a push of a button - working with my Windows computers, MacBook, android phone and iPad. This thing just works great! The only downside I'd mention is the coating. After a couple of years, the coating tends to migrate where you apply pressure. This is most apparent where the thumb and pinky finger rest. This doesn't cause any functional issues, and is entirely cosmetic, but just be aware that after a couple years it won't look pristine. All-in-all, this is the vertical mouse to buy if you're a guy with larger hands. Get one, get used to it, and you won't regret it.
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Reviewed in the United States on February 6, 2026
A
Verified Purchase
Arthur Gomez
Omaha, US
★★★★★ 5
Highly recommend! Best in the market bar none
Number of Items: 1
I would like to say this is the perfect mouse and probably the best mouse you could buy on the market and it doesn't even come close. You can modify the mouse however you like with a click on the app. It's truly been a life changing experience with this mouse. With that being said, the perfect mouse does have a few flaws but nothing that would make me not recommend it to anyone only just be aware of these things. 1. It's a vertical mouse, sometimes it gets in the way and your wrist will knock it over, it will happen I promise you. 2. Logitech has a Flow feature meaning you can connect the mouse to three different computers at once if need be, qyeah I'll say it again, three computers connection! Wow! Well I only use it for two computers, the Flow works flawlessly but my gripe is how it sometimes doesn't sync with my Logitech keyboard Ergo K860, unfortunately, the keyboard doesn't come with the same Flow feature meaning I have to depend on the mouse to do it and it doesn't work sometimes and I have to switch between the mouse transition button to the key board transition button which makes for a long headache sometimes. 3. Believe it or not connection is sometimes an issue, it losses Bluetooth connection often and it doesn't matter which computer I use I have the same issues at work and home so I use the dongle for straight connection. Oh wait there are issues with the dongle connection too? Say it ain't so? It is! The issue comes when you have two dongles like me, the keyboard and the mouse, and try to connect both, like I said I have two computers and Logitech will not allow for their ”universal dongle” to connect to two different computers at the same time terrible design flaw. 4. Again, this mouse is incredible but it can sometimes be a little too much incredible, I know, I know but hear me out. The mouse is flawless fast, one quick wrist jerk and that mouse pointer on the screen is jumping all over the place, it's been hard to find a happy medium with the pointer, it's either you adjust to slow it down, making it too slow, or adjust to make it fast, which is too fast, again no happy medium even though there are plenty of settings to toggle with. I believe most vertical mouse tend to be that way anyway only with this mouse you can really tell the difference and that could be a good thing or bad thing depending on your perspective, it's sometimes a bad thing for me on Excel sheets. So the final verdict is this is still the best mouse out there and worth every penny and I would still give this 10 stars if possible, it's been a wonderful experience with this mouse. Again, the negatives are not bad or to make someone not buy it and considering the other features this mouse can do I recommend anyone who works all day on a computer to buy this product I highly recommend it.
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Reviewed in the United States on July 28, 2021
H
Verified Purchase
Humam
Natrona Heights, US
★★★★★ 5
Excellent Ergonomic Mouse for Long Workdays
Number of Items: 1
If you spend many hours at a computer and are looking for a comfortable, high-quality mouse, I highly recommend the Logitech MX Vertical. It has made a noticeable difference in my daily comfort and productivity.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026

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