Big Block Exhaust Manifolds

Mopar Exhaust Systems

  1. 67valiant 100

    67valiant 100 go fast or go home

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    What stock mopar manifolds fit a RB (413-426-440) big block in an A-body other than factory bb a-body manifolds? Thanks. P.S. would 65 413 c-body manifolds work?
     
  2. pishta

    pishta I know I'm right....

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    Nope, only if the driver side is a rear dump, but they are low flowing beefy units. Try and get 69 Hi-po logs or similar with the #7 port going looping behind the stud. With a 5 degree mill on the mating surface on the driver side to tuck it closer to the block, they fit better. Pass side is a bolt in on a B motor without the heat riser, RB might be a different story. Hi-po's need the steering tube to be cut almost at the firewall.
     
  3. 67valiant 100

    67valiant 100 go fast or go home

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    So these won't work:
     

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  4. BBBCUDA

    BBBCUDA Well-Known Member

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    Those look like the ones I used on a 383 powered Valiant. The drivers was a center dump, and hit on the big steering coupler. A U-joint fixed that. The passenger side fit, but was VERY snug. I don't think either would work with the wider RB engine.
     
  5. Longgone

    Longgone John/68 Barracuda & Dart

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    How about some Schumacher Tri-Y`s. Not too expensive for a header and certainly as good as any stock exhaust manifold.
     
  6. RustyRatRod

    RustyRatRod Weenie idiot loser. FABO Gold Member

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    The C body driver's side HP manifold and the B body passenger side HP manifold will fit nicely. You have to angle mill the driver's side I think 1/16" of an inch in towards the block. You also have to remove and plug the exhaust valve on the passenger's side. the B body HP driver's side manifold will work also, but will not accomodate a column shift. The steering column also has to be shortened.
     
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