Technical Information :: 6611S Long Tube Headers


JBA Equipped - Greg Raymond's ‘65 Mustang Coupe.
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*actual product may differ from product shown

JBA p/n 6611S headers are designed to fit ‘64-1/2 - ‘70 289/302 (not Boss) Mustangs equipped with late-model T-5 5 speed transmissions.

These headers provide significant increases in torque and horsepower throughout the RPM range and allow for maximum ground clearance.

To help make sure you choose the correct headers, h-pipe and exhaust for your Mustang please refer to the chart below. If you still have questions, give us a call.

Note: These headers will work with a stock mechanical clutch using the factory Z-bar. If Z-bar is modified or worn use JBA p/n 1650Z.

:: P/N 6611S Fitment Guide ::

Specifications: 1-3/4" stainless steel primary tubes, 3" Firecone® merge collector, 3/8 " laser-cut flanges

Engine Cylinder
Head
Trans.
cross member
Block Clutch Trans.

289/302

289/302/5.0
"Windsor"
Stock Port
location

Use JBA x-member
p/n 1751 for 65-66
p/n 1752 for 67-70

Stock. - OK

Mechanical,
Cable or
Hydraulic

T-5
5 speed

Motor Mounts Bell
Housing
Starter
Suspension Steering
H-pipe

Stock or Total Control

Stock or
scatter shield. Scatter shield may require clearance.

Stock or
mini starter

Reproduction upper A-arm
mounting studs may need to be shortened.

Manual - OK

Rack & Pinion - OK

Does not fit factory power steering.

Use JBA p/n 6609H