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Recent dyno and road tests have proven the Dual Port can give these Toyotas as much as a 20% HP boost over the stock manifold without sacrificing fuel economy. MPG gain was as much as 15%.
5997-DP Application: 1970-74 (also fits 18RC) (Stock 2 STG Carb)
1971 – ’81 – std Bore 4 bbl
Fits Engines: 199-232- & early 258
Offenhauser 6053 DP Manifold for Courier – Mazda. Dual Port 2 B. 1800 cu in.
V-8 Dual Port Single Quad Hi Rise Manifold. AMC all V-8 1967-69 Spread Bore Qjet Carb
Manifolds below will accept 1973 and later emission control devices by using the special Offenhauser adapter kit
at a nominal extra charge. Be sure and specify type of vehicle when ordering.
Jeep Applications require Jeep kit part #6094
The following Dual Port and “C” Series manifolds will not work on the Datsun applications where the stock manifold has a provision for exhaust heat.
Offenhauser 2000cc DATSUN OHC Dual Port 2 BBL Manifold
This Block Off Plate is made exclusively for the Ford Cleveland 351-400 Dual Port Only! Part# 6249
Offenhauser Dual Port Intake Manifold 1981-’95 AMC 258
