Features

Inlet/ Outlet: 1-5/8" OD / 3" OD

3" to 2.5" exhaust collectors included

Maximizing the Smoothest High Exhaust Air Flow Rate

4-1 High Performance Racing Spec. Design, Produce the Most Top End Power

Offers the Best Flow Characteristics for the Engine at High Engine Speeds

Increase High Flow Air, Instantly Gain 10 -15 Hp. / Tq.

Modification to existing exhaust or use of aftermarket piping required

16 gauge wall piping

TIG Welded CNC Machine Flange

Metal Gaskets Included

10mm thick Header Flange

Fitment

1971-1977 Ford Maverick CID: 260, 289, 302

1964-1973 Ford Mustang CID: 260, 302

1966-1970 Ford Fairlane CID: 260, 289, 302

1963-1970 Ford Falcon CID: 289, 260, 302

1967-1971 Mercury Cougar CID: 302, 289

1966-1969 Mercury Comet CID: 260, 289, 302