if you mean the k20a3 comptech shorty header, it will fit with the stock downpipe and cat...I had it before when i took off the HKS exhaust and midpipe to go smog.Originally Posted by REEFERS
if you mean the k20a3 comptech shorty header, it will fit with the stock downpipe and cat...I had it before when i took off the HKS exhaust and midpipe to go smog.
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