I have got a full turbo back exhaust 3inch and it only mildly spikes nothing extreme but on a cold night the boost curve is really nice and just holds

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Marti


Car: C Red S13 Silvia 2.3l 400+rwhp-SOLD
Daily ae82 4age corolla (light mods)-Sold
Daily:SWB GQ Patrol
Will be a 03-04 STI next