Compression Ignition Addict
Join Date: Feb 2011
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Is the stock 3.5 exhaust with muff. delete adequate with a chip/tuner?
I did the DIY intake which improved power and even transmission shifts and am thinking of pulling the muffler off the stock exhaust on my 01' 350 to get better air flow with a straight pipe as I decide on which chip/tune.
Whether I go with an Edge Evo or a custom chip from PHP, TW I don't want to exceed 80hp. as I do not want to replace transmission #3.
My question, if I go with a chip/tune thats 80 will the 3.5 stock straight exhaust be adequate to keep EGTs down or do I need a 4"?
Back when most tuners/chips were canned I thought the advise from the manufacturers and rule of thumb was anything over 60hp. required a larger 4" downpipe.
Last edited by catman 3; 03-05-2011 at 10:03 PM.