Contour Enthusiasts Group Archives Forums Modifications Duratec Performance Single vs. Dual Exhaust

Also, don't forget that your talking about turbo cars here. The turbo cut's quite a bit of noise from the exhaust so you can (and should) run a wideopen 3" system all the way back. Turbo cars hate backpressure, NA cars need a little back pressure (at least most do) to make power.

I have had three rx-7's (86 na, 87 turbo II, 83 street ported 4 port). NA rx's run true duals each rotor has its own complete exhaust path from the exhaust port all the way out the tip(not to say that single outlets are not available but at the time the true dual was the best bet for top end power when i bought mine from racingbeat. 2nd gen turbos ran a quasi dual much like the svt, mine had a 3" down pipe, 3" cat, split to 2.5 to run to the trust (greddy) mufflers. The third gen rx-7's are all turbo's and ran a single outlet from the factory.

Can't coment on the supra's.