Patriot Exhaust Tri-Y Headers Ceramic Coated 260/289/302 1965-1970

Patriot Exhaust: H8426-1
MSRP: $533.43
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1418774400 13019
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Product Description

Patriot Exhaust Ceramic Coated Tri-Y Headers for 1965, 1966, 1967, 1968, 1969 and 1970 Mustangs with a 260, 289 or 302 Engine.

These headers will provide horsepower improvements and great looks for years to come! Constructed from 16 gauge steel tubing, then miter cut and mig welded together for a very unique sound. The primary tubes are 1-1/2", the secondary tubes are 1-3/4" and the collectors are 2-1/2". Matching h-pipes also available for the best fitment.

Tri-Y Headers Include:
- 2-1/4" Collector reducers
- Gaskets
- Hardware

*Power steering equipped cars will need part (SCB) to lower the power steering slave cylinder for clearance.
*Will NOT fit GT-40P heads or AOD transmission!
*Sometimes some small modifications are necessary to the equalizer bar and clutch rods for clearance on manual transmission vehicles.

Similar Mustang Parts

similar mustang parts More Mustang Tri-Y Headers  

Mustang Applications

This product will fit the following Ford Mustang years:

Product Reviews

Write a Review
Great headers, great price, long-term satisfaction
I bought these headers 3 years ago so this is a long-term review of how they've held up. The car has been through a number of different phases and these headers have had no issues for any of them. My 67 has a modified 289 Auto. When I first put them in, the car had power steering. I ordered the slave-cylinder drop-bracket at the time and didn't have any clearance issues. I did have issues getting any of the typical setup of power-steering hoses to work without interference within the steering system but that wasn't an issue with the headers (just be prepared to futz with the power-steering if you have it). Getting the headers into place was also a bit tricky because you don't want to damage the coating, but it's manageable.

Recently, I've converted the car to a custom rack-and-pinion setup starting off of a Unisteer rack and I can say that I had no clearance issues with the tri-y's for either the rack itself or the column linkage. I did not do a before/after dyno for any numbers but the car definitely has great power all the way up the power band. Overall the quality of the welds has been sound. I have gone back and re-torqued the bolts into the head a couple of times and never had any issues in the 3 summers of driving it with these on.
James October 20, 2014
Fit like a glove
The price is right, they seem like they are constructed well but I have not ran them yet or given them the test of time. In my 67 Coupe with a 302, no power steering, I dropped these headers in straight down from the top. They fit like a glove. They do come a little close to the starter so maybe a heat shield for the starter is in order.
Josh December 4, 2012
Great option for the 289
Pros: * Fitment, great. Typical issues with power-steering needing the relocation bracket but otherwise fit like a champ. * Sizing, for a 289 this is almost perfectly sized to keep exhaust gas velocity as high as possible. When I ran the math for the TRUE flow numbers to expect from this engine, this set came the closest to what I would actually need. * Coating, the coating has held up alright in general shop abuse before they go on. Expect a few scuffs as you fit them. * Construction, great for the price. The flange-to-tube connections are all quite well done (no gaps) and no slag/spatter in the pipes.
JamesM March 8, 2012
Great headers
I bought these headers for my 66 coupe with the stock 289 and they fit great. I had the engine out already so I bolted them on and managed to drop it in with headers attached and didn't have any fitment issues. They driver side header does come a little close to the power steering slave cylinder and the passenger side comes a little close to the starter, but they do clear. Recommend buying these ceramic coated ones over the black painted once since they hold the heat inside better without making the engine bay really hot.
Tom March 8, 2012
Pertronix Tri-Y
Bought these headers to complete my side exit exhaust 'mini-project' on my 65 mustang coupe. The driver side went on perfectly with zero clearance problems at the shock tower and the bellhousing (common clearance issue areas). I also ordered the 1966 style adjustable lower equalizer bar rod to further aid the installation process (worked perfectly; recommended for 1965s with manual transmissions). The passenger side wasn't as easy. Given my motor mounts are probably sagging a bit, there was slight contact on the shock tower and bellhousing. A few precision bangs with the trusty old ball peen hammer did the trick (hint: to not mess up the ceramic coating, lay a rag over the header). Also, there wasnt much clearance between the header and the starter 'positive' post so some modifications were applied there as well. Something that caught me by surprise was that one of the header-to-head bolt holes was 'too close' to the primary tube which wedged the socket on when tightening the bolt (had to use a socke
David February 22, 2012
try y headers
bought these try y headers because of the spark plug asses-ability. great fit into my 1970 fb 302 about 3 hours tear down and installation time per side would recommend these headers no clearance problems.
ricky anderson March 4, 2011
6 Results

Product Video

By Bill Tumas: e're here with a set of Tri-Y Headers for your '64 through '70 Mustang. The headers are made out of 16 gauge steel and feature a ceramic coating which will dissipate heat. It will also allow the headers not to rust. They feature 1 1/2 inch primaries, 1 3/4 secondaries with 2 1/2 inch collectors. They include reducers for your 2 1/4 inch pipe, gaskets for the head, gaskets for the collector, and complete hardware. These Tri-Y Headers will fit your 260, 289 or 302 engine in your '64 through '70 Mustang. It will fit all stock transmissions, will also clear a T5 as well, but they will not clear an AOD conversion. If your car's equipped with power steering, you'll need a slave cylinder lowering bracket, as well.