Quote:
Originally Posted by BOLIO 671
The Stillen kit out of the box is designed to go with a stock exhaust....you can use and aftermarket 2.5 inch exhaust with TP's or HFC's(you brand of choice) but it would require a custom tune.....these kits are known to run better on a custom tune.
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Not good advice on the HFC's. They will have a meltdown from the heat. Stock cats. Don't take my word for it, I got the info from Kyle @ Stillen.