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gavin18787

posted on 28th Apr 17 at 18:06

I ran a mantzel with a 421 and it was great. Mantzel give good high rpm gains and the 421 is better for mid range then a 41 so they go well together.
I'm out of touch with what's about now days though I'm affrqid


Cannon94

posted on 17th Apr 17 at 15:53

What's better 4-2-1 or 4-1 exhaust manifold to go with Mantzel inlet I alrdy have ? And where can I still get them brand new plz?