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Has anyone done any dyno testing to show which size exhaust diameter will prove best for a 1.6L IRTB setup? Ive read smaller diameter (2.25") will give power across a greater rpm range, but lower peak power than a 2.5" setup. I am ordering an exhaust soon and looking to get the N1 exhaust because it seems somewhat quiet. Will the 2.25" exhaust still give me a decent result or is it worth it to just get a 2.5" setup. I am running the ae101 IRTB's with megasquirt and completely stock B6 engine, with obx headers.
 
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