Flowtech Tri-Y Header
The GT350 exhaust; still doing the job. These Tri-Y headers fit the popular 1965-1970 Ford 260; 289 and 302 V8s - and they started life on the 1965-1966 Shelby GT350 with a 289 HiPo; 4-speed manual; and manual steering. Ford enthusiasts have run them in dozens of other vehicles since; chasing that sound. Mandrel-bent tubes hold consistent diameter for smooth flow; increasing cylinder scavenging and improving how the engine breathes. 1-1/2 inch primaries into 1-3/4 inch secondaries into a 2-1/2 inch collector. 3/8 inch flanges for a leak-free seal; heavy duty 16-gauge tubing; premium aluminum gaskets in the box.
Install Level: Moderate
Fits 1965-1970 Ford 260/289/302 V8 engines.
Originally designed for 1965-66 Shelby GT350 Mustangs with a 289 HiPo; 4-speed manual and manual steering.
See Flowtech's installation notes for additional fitment detail.
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 includedv
Tri-Y design
Primary tubes: 1-1/2 inch diameter
Secondary tubes: 1-3/4 inch diameter
Collector: 2-1/2 inch
Header flange: 3/8 inch thick
Material: heavy duty 16-gauge tubing
Mandrel-bent tubes - consistent diameter for smooth flow
Premium aluminum header gaskets included
Finish: not stated on this listing
Original application: 1965-66 Shelby GT350 with 289 HiPo; 4-speed manual; manual steering.
Other vehicles - confirm against Flowtech's installation notes.
