Flowtech Tri-Y Header
$265.95
Flowtech Tri-Y headers for 1965–70 Ford 260, 289 and 302 V8s. Originally built for the 1965–66 Shelby GT350, with mandrel-bent tubes, 3/8 inch flanges and a 2-1/2 inch collector.
Install Level: Moderate
Built for the 1965–66 Shelby GT350. Confirm fitment before ordering for any other vehicle.
SKU: 12120FLT
WARNING: Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead. Learn more.
Flowtech Tri-Y Header
$265.95
Finish the Build Right
Parts our crew pairs with this kit so your swap goes together right the first time.
1–2 of 1
-
Flowtech Tri-Y Headers — Small Block Ford | 12119FLT | Black
$299.95
Details for Flowtech Tri-Y Headers — Small Block Ford | 12119FLT | Black
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 includedv
Flowtech part number 12120FLT
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
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
1965-1970 Ford 260 / 289 / 302 V8 engines.
Original application: 1965-66 Shelby GT350 with 289 HiPo; 4-speed manual; manual steering.
Other vehicles - confirm against Flowtech's installation notes.
Original application: 1965-66 Shelby GT350 with 289 HiPo; 4-speed manual; manual steering.
Other vehicles - confirm against Flowtech's installation notes.
Talk to a Parts Specialist
Not sure it fits your truck, or planning a bigger build? Our parts specialists will help you get the right parts the first time.
Tip: have your truck's year, make and model handy.
Hours: Mon–Thu 8am–5pm · Fri 8am–2pm (Arizona Time)
Reach out after hours and we'll get back to you the next business day.