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Offenhauser Chrysler 413/440 Tunnel Ram Power Port Manifold Dual Quad Top A whole series of COMPETITION Manifolds designed to suit your particular needs. Tested and proven to out perform other so-called top performers, these combinations appeal to not only the professional, but also to those who demand the finest performance products that can be…
Gaskets made by Offenhauser to go between the base and top of their tunnel ram manifolds for small block chevy, small block Ford, Boss 302 Ford, Cleveland Ford, small block Mopar 340, 360 cu. in. and Oldsmobile big block 400, 425, and 455 cu. in. This pr. of gaskets will fit any of these Offy…
Offenhauser 5915 Dual Quad Top. Use Holley carbs only. For Ford 289-302.
Photo represents multiple applications. Please contact us directly for more information regarding available bases.
Ford Turbo Thrust Power Port Manifold 289-302 Single Quad Top
Dual Quad High-Rise, 1970 and later American Motors.  All V8’s.  Shipping weight 21.5 lbs.
Offenhauser Engine Adapter for ’49-’64 Ford and Mercury V8 to Jeep or Scout Transmission.
Part #5920
Pilot Brushing and Transmission Gasket Included
Offenhauser 5921 Tunnel Ram Base for Chevrolet 283-400. Base only. Use 5921 G for gasket in between 5921 base & 5922 top.
Fits the following tops:
If you do not see your top listed for purchase, please email or call us.
Turbo Thrust Power Port Manifold Chevy 283-400 Single Quad Top
Offenhauser 5923 Dual Quad Top for Holley carbs on a 5921 base.
Carb Adapter Fits AFB carb onto Holley 4500 manifold. Carburetor Bolt Pattern:4-bolt (5 3/8 in. x 5 3/8 in.) Manifold Mounting Flange:Spread bore 4-barrel Manifold Bolt Pattern:4-bolt (5 5/8 in. x 4 1/4 in.)
 Carb adapter Fits AFB carb onto Holley 4500 manifold Offy part# 5925r
Turbo Thrust Power Port Manifold Chevy 283-400 Holley 4500 Single Top
