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Description
Skunk2 Ultra Series Camshafts - K-seriesSkunk2s Ultra Series Camshafts for Hondas K series engines dramatically increase both horsepower and torque yet retain complete valvetrain stability and exceptional engine response. Ideal for heavily modified engines, Ultra Series Camshafts are manufactured from proprietary, high quality forged tool steel cores, are CNC ground, and feature patent pending profiles with unique lobe shapes and revolutionary lift, velocity, and acceleration
Skunk2’s Ultra Series Camshafts for Honda’s K-series engines dramatically increase both horsepower and torque yet retain complete valvetrain stability and exceptional engine response. Ideal for heavily modified engines, Ultra Series Camshafts are manufactured from proprietary, high-quality forged tool steel cores, are CNC ground, and feature patent-pending profiles with unique lobe shapes and revolutionary lift, velocity, and acceleration characteristics.Up to 80 hp gains with Skunk2’s Ultra Series line of camshafts, Skunk's professional line of high-lift, racing camshafts for Honda’s K-series VTEC engines. Ultra Camshafts are designed to optimize mid-range and top-end horsepower and torque, with peak power moved up the RPM band. As a result, VTEC crossover is seamless, allowing for the broadest powerband possible. No other line of racing camshafts even comes close to Skunk2’s Ultra Series. What's more, Ultra Camshafts are also the perfect addition to any high-output, turbocharged engine.
Skunk2 camshafts deliver unparalleled power as a result of continual, extensive development and testing. By utilizing advanced manufacturing techniques and the latest computerized simulation and modeling equipment, Skunk2 camshafts are able to deliver maximum power across the entire powerband. Skunk2 designs and tests all of its camshafts in-house to ensure the highest quality and performance. Each camshaft is manufactured of forged tool steel core, increased torsional strength, improved durability characteristics, and reduced frictional effects. All Skunk2 camshafts are ground to exact specifications using state-of-the-art CNC cam grinding machines equipped with cubic-boron grinding wheels and feature hardened, wear-resistant lobes and surfaces.
Skunk2’s Ultra Series Camshafts also feature Fast Ramp and AMAX profile technology, which increases overall performance and results in unmatched response from idle to redline. AMAX technology simply maximizes the area under the lift curve but without compromising reliability or valvetrain stability. Skunk2’s profiles feature more duration than competitors’ at lifts above 1mm, resulting in greater efficiency and more power. And thanks to Fast Ramp, the same technology used in Formula One racing, seat timing is reduced, which results in additional cylinder pressure and more torque but without compromising valvetrain longevity.
Skunk2 camshafts designs are the direct result of our years of drag racing and road racing efforts. In addition to each Skunk2 project car and race vehicle, the world’s top road racing and drag racing teams have relied on Skunk2 camshafts for years.
Requirements for all Ultra 1/2/3/4 Camshafts
- Skunk2 Pro Series Valve Springs (P/N 311-05-5380)
Or - Pro XP Valve springs (P/N 311-05-7380) recommended for Turbo applications
- Titanium Retainers (P/N 308-05-0410)
- Click HERE for K-series guideline camshaft chart
Ultra 1 Details
- Recommended: High-compression, upgraded fuel injectors.
- Intake Centerline: variable
- Exhaust Centerline: 112° BTDC
- Duration(Intake/Exhaust): 264°/264° @ 1mm
- Lift (Intake/Exhaust) : .540" @ 0.000" lash / .530" @ 0.000" lash
- Valve Clearance (Intake / Exhaust): .008” / .010”
- RPM Range: (varies)
- ** 3 Lobe Forged Tool Steel Core *
Ultra 2 Details
- Recommended: High-compression, upgraded fuel injectors.
- Intake Centerline: variable
- Exhaust Centerline: 112° BTDC
- Duration (Intake/Exhaust): 270°/270° @ 1mm
- Lift (Intake/Exhaust): .560" @ 0.000" lash/ .535" @ 0.000" lash
- Valve Clearance (Intake / Exhaust): .008” / .010”
- RPM Range: (varies)
- ** 3 Lobe Forged Tool Steel Core **
Ultra 3 Details
- Recommended: High-compression, upgraded fuel injectors.
- Intake Centerline: variable
- Exhaust Centerline: 112° BTDC
- Duration (Intake/Exhaust): 275°/277° @ 1mm
- Lift (Intake/Exhaust): .580" @ 0.000" lash/ .565 @ 0.000" lash
- Valve Clearance (Intake / Exhaust): .008” / .010”
- RPM Range: (varies)
- ** 3 Lobe Forged Tool Steel Core **
Ultra 4 Details
- Recommended: High-compression, upgraded fuel injectors.
- Intake Centerline: variable
- Exhaust Centerline: 112° BTDC
- Duration (Intake/Exhaust): 280°/283° @ 1mm
- Lift (Intake/Exhaust): .575" @ 0.000" lash/ .595" @ 0.000" lash
- Valve Clearance (Intake / Exhaust): .008” / .010”
- RPM Range: (varies)
- ** 3 Lobe Forged Tool Steel Core **
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.7 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Good, but size up!
Color: Black, Size: 30W x 29L
These are exactly what I wanted, but as many have stated, you need to size up. I found that going up two sizes (from my usual 28 to a 30) made for a great fit. I love that they come in a 29 length. One anything point is they came with creases in them from being folded in the package for a length of time. I had to steam and press them before wearing. I’ll likely buy them in other colors.
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Reviewed in the United States on March 18, 2026
★★★★★ 5
Great Pants
Color: Khaki, Size: 46W x 32L
Great pants but buy one size up in the waist. They are well made, comfortable, and good looking. They are Dickies brand what more needs to be said.
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Reviewed in the United States on May 2, 2026
★★★★★ 4
order 3 or 4 inches up than your usual waist, run very small in waist
Color: Charcoal, Size: 33W x 30L
arrived with dirt on the bottom legs but amazon helped with that. anyway I weigh 115 lbs and am 5'8 and I am a woman. I know that Dickies these days run super small for their size, so it sounds insane but order up 4 inches than your normal waist size, then run small in the waist and they will shrink a size with a few washings. I ordered a 33 waist and they did shrink probably a size in one wash lol! they are still a bit loose in the waist but not big and I know with a couple more washings they will be just right. I do not like anything skinny fit or with no give. but yah, I love the charcoal gray color, one of my favorite colors, much cooler than plain black. I normally enjoy the Dickies shorts but with these forty something degree afternoons these are my new go tos. I am not a jeans person and I sure as hell with not be wearing pajama pants out in public like these dang younger adults lately.
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Reviewed in the United States on December 7, 2025
★★★★★ 5
Perfect fit every time
Color: Silver, Size: 30W x 30L
These original 874’s are the real deal. Stocked up during the sale and got them for my husband. He loves all the colors and the durability of these pants is incredible. He still has some from 14 years ago!
But he wanted a few new ones- and they had more colors so I stocked up and surprised him when I told him how much they cost during the sale.
These pants never wrinkle. I wash them hot and air dry- no wrinkling or shrinking. They look great. They’re sewn to perfection. The quality is there and has been for years, a reason my husband only wears these.
Quality, value, durability, style, fit. Great for all seasons, they’re not too heavy or too light. Great functionality- pockets for everything . Great even in summer - they are very breathable. Perfect fit every time. Great for heavy road construction or just going for a hike.
Highly recommend!
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Reviewed in the United States on November 22, 2025
★★★★★ 5
Good work pants
Color: Dark Brown, Size: 46W x 32L
run small / snug I would recommend getting next size up minimum.
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Reviewed in the United States on May 18, 2026
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