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Description
Flowtech 12119FLT Tri-Y Header 65-70 Ford 260-302 V8 1-1/2 inOverview: Flowtech Headers are the perfect combination of quality and value. These Tri Y style headers fit the popular 1965 1970 Ford 260 289 302 V8 engines. These Tri Y style headers were originally designed for 1965 1966 Shelby GT350 Mustangs with a 289HiPo V8, 4 speed manual transmission, and manual steering. Over the years, Ford enthusiasts have used these headers in dozens of other vehicles to get that classic Shelby sound and performance. See
Overview:
Flowtech Headers are the perfect combination of quality and value. These Tri-Y style headers fit the popular 1965-1970 Ford 260/289/302 V8 engines. These Tri-Y style headers were originally designed for 1965-1966 Shelby GT350 Mustangs with a 289HiPo V8, 4-speed manual transmission, and manual steering.
Over the years, Ford enthusiasts have used these headers in dozens of other vehicles to get that classic Shelby sound and performance.
See Installation Notes for additional information regarding fitment details regarding these headers.
Features:
- Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increases the cylinder scavenging effect and improves engine breathing
- Heavy duty 16-gauge tubing for increased strength and durability
- 1-1/2” diameter primary tubes, 1-3/4” diameter secondary tubes for increased exhaust flow increasing performance and improving throttle response
- 2-1/2” collector for maximum strength and exhaust flow
- 3/8” thick header flange for a leak-free seal and maximum strength
- Premium aluminum header gaskets included
- Available in a high heat resistant black paint or polished finish
Fitment Notes:
- Attempt to install in any other application WILL require some modification
- These headers will not fit vehicles utilizing an FMX, C-6, or AOD automatic transmission
- May not fit some vehicles utilizing a C-4 transmission with 164-tooth bellhousing.
- Those using a 157-tooth bellhousing with require some clearancing on RH side of bell
- Will NOT work on 351W motors. (Due to taller and wider engine dimensions)
- Will not work with GT40-P cylinder heads
- Headers will work with 10" or 10.5" clutch, use of a 1968-newer bellhousing will require clearance on LH side of bellhousing
- 1969-1970 model vehicles may require additional clearance for steering box
- Use of these headers on a non-HiPo model will require extra clearance for clutch linkage
Applications:
| Year | Make | Model | Engine | Fitment Notes |
| 1966-1968 | Ford | Bronco | 4.7L V8 289 CID | C4 Transmission Please See Above! |
| 1968-1970 | Ford | Bronco | 5.0L V8 302 CID | C4 Transmission Please See Above! |
| 1965 | Ford | Custom | 4.3L V8 260 CID | T-10H, T-10M, T-10J, T-10L, C4 Transmissions Please Seee Above! |
| 1965 | Ford | Custom | 4.7L V8 289 CID | T-10H, T-10M, T-10J, T-10L, C4 Transmissions Please See Above! |
| 1966 | Ford | Custom | 4.7L V8 289 CID | T-10Q and C4 Transmissions Please See Above! |
| 1967 | Ford | Custom | 4.7L V8 289 CID | C4 Transmission Please See Above! |
| 1968-1970 | Ford | Custom | 5.0L V8 302 CID | C4 Transmission Please See Above! |
| 1969-1970 | Ford | E-100 Econoline | 5.0L V8 302 CID | C4 Transmission Please See Above! |
| 1969-1970 | Ford | F-100 | 5.0L V8 302 CID | C4 Transmission Please See Above! |
| 1969-1970 | Ford | F-250 | 5.0L V8 302 CID | C4 Transmission Please See Above! |
| 1965 | Ford | Fairlane | 4.7L V8 289 CID | T-10H, T-10M, T-10J, T-10L, C4 Transmissions Please See Above! |
| 1966-1967 | Ford | Fairlane | 4.7L V8 289 CID | C4 Transmission Please See Above! |
| 1968-1969 | Ford | Fairlane | 5.0L V8 302 CID | C4 Transmission Please See Above! |
| 1965 | Ford | Galaxie | 4.7L V8 289 CID | T-10H, T-10M, T-10J, T-10L, C4 Transmissions Please See Above! |
| 1966-1967 | Ford | Galaxie | 4.7L V8 289 CID | C4 Transmission Please See Above! |
| 1968-1970 | Ford | Galaxie 500 | 5.0L V8 302 CID | C4 Transmission Please See Above! |
| 1966-1967 | Ford | LTD | 4.7L V8 289 CID | C4 Transmission Please See Above! |
| 1968-1970 | Ford | LTD | 5.0L V8 302 CID | C4 Transmission Please See Above! |
| 1965 | Ford | Mustang | 4.3L V8 260 CID | T-10H, T-10M, T-10J, T-10L, C4, Toploader Transmissions Please See Above! |
| 1965 | Ford | Mustang | 4.7L V8 289 CID | T-10H, T-10M, T-10J, T-10L, C4, Toploader Transmissions Please See Above! |
| 1966 | Ford | Mustang | 4.7L V8 289 CID | T-10Q, C4, Toploader Transmissions Please See Above! |
| 1967-1968 | Ford | Mustang | 4.7L V8 289 CID | C4 and Toploader Transmissions Please See Above! |
| 1968-1970 | Ford | Mustang | 5.0L V8 302 CID | C4 and Toploader Transmissions Please See Above! |
| 1965-1967 | Ford | Ranchero | 4.7L V8 289 CID | C4 Transmission Please See Above! |
| 1968-1970 | Ford | Ranchero | 5.0L V8 302 CID | C4 Transmission Please See Above! |
| 1968-1970 | Ford | Torino | 5.0L V8 302 CID | C4 Transmission Please See Above! |
Specs:
| Brand | Flowtech |
|---|---|
| Bolt Size | 3/8-16 x 3/4 |
| CARB (California) Compliant | No |
| Collector Diameter | 2.50 inch |
| Header Finish | Black Paint |
| Header Style | Tri-Y |
| Material | Mild Steel |
| Primary Tube Dia. | 1-1/2 inch |
| Product Type | Headers |
Emissions:
- This part is legal for sale or use on Racing Use Only Vehicles
- The following vehicles are considered Racing Use Only Vehicles:
- Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.
- WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
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
4.9 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Excellent Car Sound Deadening and Heat Insulation Solution
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
If you're looking for a high-quality car sound deadening and heat insulation material, then the Siless Liner 157 (4 mm) mil 36 sqft is definitely worth considering. This product is designed to offer superior noise reduction and heat insulation for your car, making your driving experience more comfortable and enjoyable.
The closed-cell foam material used in this product is of premium quality, and it effectively blocks out external noise and vibrations. This means you can enjoy a quieter and more peaceful ride, even on noisy roads. In addition, the Siless Liner 157 also provides excellent heat insulation, which can help keep your car cooler in hot weather.
One of the best things about this product is that it's very easy to install. You don't need any special tools or equipment, and the material can be easily cut to fit any shape or size. It's also very lightweight and flexible, which makes it easy to work with.
Overall, the Siless Liner 157 (4 mm) mil 36 sqft Car Sound Deadening Closed Cell Foam & Heat Insulation mat is an excellent choice for anyone looking to improve the comfort and performance of their car. It's a high-quality product that delivers on its promises, and it's definitely worth the investment.
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Reviewed in the United States on March 12, 2023
★★★★★ 4
Heavy-Duty That Works!
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
This extreme sound deadening mat performs well for reducing road noise and vibration. It feels dense and adheres securely when properly applied. Once installed, it noticeably improves interior quietness.
Overall, it’s a strong choice for more serious sound insulation projects.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Good product, quite sticky I must say.
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Worked for my van insulation
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Good stuff
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Good stuff, easy to use, self adhesive backing contours around curves easily and works great.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Works amazingly, but only if you install it correctly.
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
If you purchasing Siless Liner 157 mil (4 mm) Sound Deadening mat, to block unwanted sounds in your car, this is what you need to buy. But wait! It's not the only thing you need to buy if you want to "actually" deaden sound.
By itself, it will definitely block a noticeable amount of sound, and, most likely, that's all you realistically need. But... But... If you want the Siless Liner Sound Deadening Mat to really help you take it up a few notches, to get the best sound almost bordering on soundproofing, listen up.
You will have to install traditional butyl rubber first. Doesn't have to be the Siless brand, but I'm sure they would love to sell both to you, I used both Killmat (80mil) and Noico (50mil).
I have a Honda S2000. It's a two-seater convertible sports car if you don't know what this car is, and it's loud when I'm driving above 60mph. I also happen to have a sound system installed as well. Other than that, the car is stock. I first installed the butyl rubber on the car's interior sheet metal. I went all out and covered everything I could. I didn't need to but I wanted to. I was extremely impressed with the results. But I wanted to go further. Not because I needed to but because just wanted to see what it would be like.
So I bought Siless Liner 157 mil (4 mm) 36sqft Sound Deadening mat to go on top of the butyl rubber mats. I put this over every area I installed the butyl rubber. I had to be careful of clearance issues since I added a significant amount of underlayment, and you should too.
If you put butyl rubber sound-deadening materials in 50% of the total interior area, you'll hear a noticeable improvement. If you put butyl in about 80% of the total area, you'll be even more amazed at the improvement, compared to before.
I originally did all the above myself, so that's my experience and so your mileage may vary.
I then installed the Siless Liner Sound Deadening mat over every place I could even going further than I could with the butyl rubber. I used the Siles Liner in areas where butyl rubber would not have been effective, such as the roll bar hoop area and large empty cavities or holes.
I covered everything I could, firewall, doors, floor pan, transmission tunnel, trunk, trunk lid, fuel tank area, rear quarter panels, and rear-wheel tunnels, in Siless Liner Sound Deadening Mat.
WOW!! The Siless Liner Sound Deadening Mat was the icing on the cake! Let's not forget, this car is a convertible sports car so it will never be a quiet ride, ever. But I can now actually have a conversation with a passenger at a normal-ish volume! This also means I can now have a normal hands-free phone call without having to plug one ear to block out the noise! My sound system sounds so much better! Just by going through the install process, I looked for any vibration, rattle, squeak, and noise-prone areas to either eliminate or reduce unwanted noise production. If you forget this step, the inside and outside of your car will rattle and buzz. I skipped this step the first time around. But did it right before I installed more butyl rubber and the improvement was impressive, especially inside the car. Outside the car, I didn't notice a difference until I put the last layer of Siless Liner Sound Deadening Mat. The sound deadening mat works both ways from what I can tell. If I turned up my music, as loud as I occasionally do, parked in the attached garage to the house, with the garage door closed, I would be barely able to tell the car was playing music in the garage. It sounds like it is another car, just a little bit down the street, with a very loud base. If you stand 20 feet away outside the car, the sound system is noticeable, but not obnoxious by a long shot.
Get a 3 piece wood/metal roller set as well, which makes quick work of large areas.
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Reviewed in the United States on December 23, 2021