Page 5 of Offenhauser Automotive Performance Products by Exeter Auto Supply

exeter auto supply 559-592-2707 4 new dual quad manifolds for chevrolet 396-454 oval port heads first of its kind on the market 4 new dualquad 360 equa=flowmanifoldsfor all 396-454 oval port chevrolet engines the new chevrolet dual quads are engineered with the revolutionary 30 equa=flow 6 design that has been proven over and over again to out-perform any other dual quad design manifold you asked for it we made if part no description 6274 high-rise dual quad for standard holley/carter carburetors 6275 low-profile dual quad for standard holley/carter carburetors distance between carb centers on manifolds is 8 holley carbs requiring extra space must be mounted sideways using offy part #5832 carb adapters and #5967 linkage this applies to #i6274 and #6275 only part no 6276 oescrlption high-rise dual quad for quadrajetlthermo-quad carburetors 6277 low-prof ile dual quad for quadrajettthermo-quad carburetors dual quadrajet manifolds do not have enough area for 2 holley spread-bores use carter early rochester or holley model #4360 carburetors distance between carb centers is 8 chevigmcijeep v6 173 c.i.d 60 4 bbl dual port manifold born for street excitement this performance intake manifoldwas designed specifically for the v6 60 engine to give optimum torque and horsepower increases from low to mid rpm range complete dyno and street tests show an excellent 23 horsepower increase with torque gain you can really feel on thestreet or highway through the unique and patented dual port configuration this manifold is designed to provide small quantities of highvelocity fuel during low end acceleration and larqe quantities of slow-moving fuel for maximum top-end performance 6272-op part m272-dp uses holley #0-6299 390 cfm holley #o-boo p cfm linkage modifications necessary holley #0-9973 450 cfm requires additional ofw adapter platew264 which is available separately and is listed on page 31 a special offenhauserlow profile air cleanere6273 page31 is available and clears both the air conditioning pump and distributor cap ifthe stock distributor is retained,such as the one used on chev slotruck orany other gmc vehicfewith the electronic advance system a fixedtiming no advance will result the ignition timing on this type should be set approximately 15 total advance ifa full mechanical or vacuum system is used then set the timing at about 24 26 advance manrfold comes with complete installation kit and linkage note this manifold is not made fw transverse mounted enaines -

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