exhaust

[WARP TEN]

Originally Posted by KILLSHOTS

The stock exhaust was designed to muffle sound, of course. But it was also tuned to eliminate the inherent resonance baked into our cars. It hits hard in the 1800ish RPM range and again in the 3400ish RPM range. The resonator was tuned to help part of it and the mufflers were tuned to help the other part of it. The exact details don't matter, but to answer your question somewhat succinctly, the Corsa system was designed in much the same way, except with much less restriction. What you have in the Corsa is a system that is somehow as effective at quelling resonance at all RPM as the stock system, but still causes virtually NO restriction. It is quiet at part-throttle but straight-pipe loud at full-throttle. Any exhaust can sound throaty or be "open" but in my opinion, the Corsa is brilliant because it just does everything right.

Chris is right. Over 20-odd years of owning ZR-1s, I tested and used a half a dozen systems and the Corsa was the best aftermarket system for flow (HP), sound and lack of resonance. Designed like the stock system to eliminate the resonance at the two rpm points that our cars really have it. Had Corsas for probably 12-15 years total. However as most of you know by now, I finally went back to the stock 95 system with electric cutouts for racing and just making noise when I want to. Usually run with them about1/3 open, but close them when I come back into our subdivision to appease my wife. Really like the set up. Quiet when I want it (say a long trip) and as noisy as I want other times. Headers, no cats, when open basically a straight through system as the stock resonator has little flow resistance. --Bob