Thread: 65/66 mustang GT40P headers?

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Mustangs Plus in California should have a set that works.

Sanderson FF-1 block huggers will probably work though you will need to make up a new head pipe. Tell them that the heads are GT40P as I think they have been further refined.

sadly those ones wont fit the 66 mustang, the way the shock towers are designed on the car.... theres only 3 header designs that work and i dont know if anyone makes a gt40p option.... but the tri Ys work... the doug thorley and other similar models work designed for the car... and the 351 conversion ones work..... the 351 headers work best for clearance, specially on a 302/289.... but the other ones fit too, you will still have parts of the header tubes touching the shock towers, its just way too tight of a squeeze..... the two sources i would try for headers would be national parts depot and JBA.... JBA i think does make a set for gt40p heads, but their cheapest sets of headers run around $650