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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…
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.
Dual Quad High-Rise, 1970 and later American Motors.  All V8’s.  Shipping weight 21.5 lbs.
Turbo Thrust Power Port Manifold Chevy 283-400 Holley 4500 Single Top
Turbo Thrust Power Port Manifold Ford Cleveland 351 (Boss) Single Quad top
Offenhauser 5964 Intake Manifold Ford 351 Cleveland Single Quad Hi Rise. For 4V Heads. Manifold fits all regular Holley and Carter AFB 4-Barrel Carburetors
5970 – Ford 6 Cylinder Manifold 170/200/250. 1970 and later Ford 170-200-250 C.I 6 Cylinder Triple Manifold.
This 360 manifold is designed to use a 1974 or earlier stock carburetor in the center and two smaller venturi carburetors on each end. (Small 2 bolt 2-5/8″). The special throttle linkage is a progressive type, which opens the center carb first and then the end ones. Manifold comes complete with linkage and detailed instructions for proper installation.
NOTE: It is necessary to remove the cylinder head to install the manifold.
5974 – Ford 429/460 Cobra 71 & Later Dual Quad Top competition manifold A whole series of COMPETITION Manifolds designed to suit your particular needs. Tested and proven to outperform 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…
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)
5997-DPH Application: 1970-74 (also fits 18RC) (Holley 5200)
5997-DP Application: 1970-74 (also fits 18RC) (Weber 32/36)
1971 – ’81 – std Bore 4 bbl
Fits Engines: 199-232- & early 258
Buick and Jeep V-6, Uses standard 4bbl carb from 400 CFM to 600 CFM depending on whether it’s for street or competition.
6035-DP Buick/Jeep, 225 C.I., 1964-72
6035-DP Buick/Olds/Pontiac, 231 C.I., 1975 (will not fit HEI)
6035-DP Buick/Olds/Pontiac, 231 C.I., 1976-78 (Will not fit Tall Port heads due to port size.)
Offenhauser 6042 I-R Adapter- fits Reg. holley Carb On to 5908, 5911, 5944, 5971
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