Blaze420 Posted November 24, 2003 Report Share Posted November 24, 2003 What is the highest flowing exhaust system for the most HP increases for a 90' Chevy Lumina. I can't find very many and the ones I found were all pretty much the same it's just some cost $950 and another one costs $200. Quote Link to comment Share on other sites More sharing options...
gp90se Posted November 24, 2003 Report Share Posted November 24, 2003 basiclly stock 3.1, custom bent mandrel piping 2 1/2, high flow cat/no cat and glasspacks. cant get much more free flow then that (unless ya dont run any exhaust =) -Jeff Quote Link to comment Share on other sites More sharing options...
sonyman87 Posted November 24, 2003 Report Share Posted November 24, 2003 basiclly stock 3.1, custom bent mandrel piping 2 1/2, high flow cat/no cat and glasspacks. cant get much more free flow then that (unless ya dont run any exhaust =) -Jeff i want to say Magnaflow cat and mufflers. thats as close as you can get to straitpipe and be legal! Quote Link to comment Share on other sites More sharing options...
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