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I was wondering if someone could answer these questions for me. As a side note it doesn’t matter what brand of HFC/test pipe and I do understand there will be
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![]() Join Date: Apr 2010
Location: moody afb//Marietta, GA
Posts: 75
Drives: e46 M3///2009 370z
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I was wondering if someone could answer these questions for me. As a side note it doesn’t matter what brand of HFC/test pipe and I do understand there will be differences from one brand to the next.
What are the number gain differences between high flow cats and test pipes? How do I prevent my CEL from light coming on with either installed? Will it be 100% necessary to get a tune after installing test pipes? As from what I understand any tampering with the computer automatically voids the warranty. Right now I’m leaning more towards some resonated test pipes but I want to make sure I ask opinions as a part of my due diligence before buying. Thanks for the help. |
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