He's talking about the performance of it all. The first exhaust mod you do is proven to show the vast majority of gain you're goin to have with hfcs probably giving you a bit more tq than just a catback but not quite the top end that a solid x pipe has shown especially with fast intentions. Obviously its going to sound more aggressive after switching out the catback also but if you're talking about performance which is what I'm looking for, hfcs and a tune is the best money/power ratio period. Hopefully aam will get back to me and several others about what's the deal with their cobb ap map deal. If you could get 30 whp with those mods I'm calling it a day.
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