There is good info on sites about Oldsmobile intake manifolds. The A4 the # 16 and the # 17 . I have a 307 with the #17 cast iron intake . My car is not a hot rod and will never need to go fast . Unlikely my manifold would ever need to be removed from my engine, but should i have a different intake on stand by for just in case it does need to come off ? I know of an A4 aluminum intake for sale . Would this be a better intake for my car ? Sounds like the A4 is not better then my #17 just lighter weight . But the A4 could be better with some work . What is an average price for an A 4 ?