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hey guys i have a 2013 brz and i have and aftermarket catless header an invidia catless mid pipe and over pipe and an invidia n1 cat back and have an oft with a backfire tune and ive tried -7 all the way to -12 on my b timing and i still only get a popcorn backfire and occasionally a small flame here and there does anyone know why or how to change that because everyone that ive seen online has the same tune and is able to shoot decent sized flames out the back at like 4k rpm? is there a way to tune my car a little more rich to make the flames bigger?
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