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Originally Posted by orion::S14
^^^ Yep, stock S13 setup is NOT bad.
Maybe a 1-2rwhp gain going with a HotShot over stock...not really worth it for the $$$.
Now, on an S14...5-6rwhp at least is expected...the cat is VERY restrictive, and you can still use one under the car to keep it smog friendly (stock, there is an empty shell there as a resonator...looks like a real cat, though).
- Brian
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Brian not here to make fun of, but the 92 s13's made almost 7RWHP with the DC sports.....
Although DC isn't a hotshot scavaging and flow are much better since back pressure throughout a high performance header is reduced to a minimal. Nissan stock headers are designed for maximum backpressure for the EGR system.
