Quote:
Originally Posted by pbonsalb
You also won't get much power. The most expensive and arguably the best axle back, the titanium Akra, claims 3 rwhp. They sound nice, though. BMW just claims a "more powerful sound" for its very expensive axle back.
If you want power, consider a pulley, a filter, a midpipe and a tune. What midpipe will add power but not trigger a CEL and preserve readiness for plug in OBD2 inspection is a good question. My understanding is that you either need high flow cats (probably 300 cell) before the rear 02 or a tune with rear 02 simulation. Not many midpipes have HFC before the rear 02 (not even the Akra) and not many tuners can simulate the rear 02. M3DCTBT says he has some suggestions and I am considering them.
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It's not the catalyst cell count that triggers it, it can be done with test pipes, i've done both. It's all in the programming.