Driver impressions from those who did some porting please

[WARP TEN]

Originally Posted by Gunny

For the "sleeper" idea, consider this ...
4:10, porting, headers, and late C4 stock exhaust with electric cutouts. Try to locate a 95 stock ZR-1 exhaust or a 96 LT4 exhaust. Install a pair of QTP electric cutouts just ahead of the muffler inlet. The cutouts are controlled by a switch located to your convenience. Totally open it's very close to running open headers - totally closed it's almost stock sounding (headers add a nice touch) - partially opened to taste, you can pick the sound that you like. Drone is only present when you open more than half-way.

I've had the stock system on my 90, 2.5" Borlas, 2.75 Borla Challengers, Corsas, stock 95 exhaust, and finally the stock 96 LT4 w/cut outs, SW headers, and porting by Marc.

Highly recommended: listen to & ride or drive as many Z's with different setups before you start modding your exhaust ... it will save time & money in the long run.

Bill, George is right--If you like a sleeper look but the ability to add power and be very loud when you want it, go for headers (with or without cats), a stock '95 system with cutouts. I used Corsas for years and they had a great sound and were the best to minimize drone, but in my old age I got a little tired of a loud exhaust all the time. This allows you to be almost as quite as stock (which still sounds pretty good) when you want it, but loud and open for power when you want it also. Allows you to preserve the spare tire carrier which I wanted. Based on Tony Davila's idea, I had Marc H. install mine right in front of the stock mufflers with a rocker switch hidden under the carpet on the passenger side of the console within easy reach. Relatively quite when closed, and basically straight pipes when open. I usually ran about one third open for some solid rumble. Wide open for racing and when I wanted to scare pets and small children. Here are a couple of pics--I have more pics if you decide to go this route. There is a video on my YouTube page of me running at NCM Motorsports park with them open if you want to hear what they sounded like. Here is a link: https://www.youtube.com/watch?v=DBwKZrENBS0&t=615s --Bob