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
Verification Code
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