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Just a FYI on adding Longtube headers to the B&B Rte 66 catback system - I did and the very mild amount(before headers) of reasonance between 1,400 rpm and 1,800 rpm became really loud and annoying. The Rte 66's became much louder overall - but sounded good - the reasonance level caused me to switch to Corsas. Just wanted to make you aware as you state you want to keep all your current mods.
I plan on adding a Magnuson SC to mine, which should put me well over 400rwhp. I suspect you would need heads and LT's to get there if you stay away from supercharging. Good luck
I would like a supercharger but if your trying to keep the mods already on and you want that 400 rwhp, heads would be in your best interest. You may prefer nitrous which will give you a bunch of power.
if your trying to keep the mods already on and you want that 400 rwhp, heads would be in your best interest. You may prefer nitrous which will give you a bunch of power.