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#1
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1970 grand prix sj 455
Has anyone put factory ram air exhaust manifolds on a 70 grand prix sj 455? What exhaust is the best fit?
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#2
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Just have to mimic what Pontiac did on the '69 428HO GP & '65-69 B series with 421 HO & 428 HO engines.. Will need long branch HO manifolds & the special oil filter adaptor. Dport long branch manifolds have been reproduced for many years, both by Classics of OH, sold to many retailers, & RARE's own castings.
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