This exhaust is just a catback. Catbacks have no effect on stage 2 and performance just aesthetics. The downpipe is what you will be concerned with when going to stage 2.
Not at'll. To be honest I don't recommend the SPT exhaust to anyone. There are far better aftermarket exhausts for the money/performance.Are there any power gains with the SPT Exhaust ?
Not at'll. To be honest I don't recommend the SPT exhaust to anyone. There are far better aftermarket exhausts for the money/performance.
REP+ but given the limit already, sorryNope
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So did Subaru de-tune (restrict airflow) the downpipe to keep the noise low?It's no problem sir. Any exhaust that is cat back doesn't have a measurable effect on power. They also won't require a tune.
The downpipe is where the power is made, it will require an ecu recalibration.
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You think the SPT exhaust would be less restrictive which would provide better air flow.No. I've never spent much time investigating the restriction there outside of the 2.5" pipe and cat. But an aftermarket downpipe flows much better and even with ots tunes from cobb the power change is noticeable
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Pricey exhaust just to have a little throaty sound and STI etched on the exhaust tip.Nope
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