Installed cut outs on my C6
Thread Starter
Tech Contributor
Joined: Jul 2002
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From: St. Louis, MO
St. Jude Donor '08
Thread Starter
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Thread Starter
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
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Thread Starter
Tech Contributor
Joined: Jul 2002
Posts: 14,950
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From: St. Louis, MO
St. Jude Donor '08
I had cutouts on my Hurst/Olds in the classic spot right by the collectors. That was deafening. No way you could drive on the street like that. These are not nearly that loud. The fact that these are way back in the pipes and directed at the ground muffles the sound. Exhaust sound is important to me, and these sound great. Just perfect. Deep at idle like Borlas (rumbles the car) but screaming at WOT like Corsas. Sounds like a NASCAR at WOT.
Team Owner
Joined: Jan 2007
Posts: 22,136
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From: In the woods looking for my thrown putter.
St. Jude Donor '13, '15
The cutouts are electric.
http://www.quicktimeperformance.com/QTEC/index.php Click the "shop online tab" to see the electric cutout packages.
Le Mans Master
Joined: Jan 2000
Posts: 6,725
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From: South Bend IN
Very Nice Looking Install. I'm curious as to how reliable these are long term prior to getting a set for my C5. I'd love to have them for the track but with my back trouble i just cannot be messing with hung up openers under a car. Any help on their reliability will be greatly appreciated. I have the LG Stainless Headers with RT Cats so i think i'd need 2 3" cutouts. I wonder if these open would gain me a 10th in the quarter? Anyone know?
Last edited by Dave00C5; Apr 27, 2007 at 10:09 PM.
Thread Starter
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Very Nice Looking Install. I'm curious as to how reliable these are long term prior to getting a set for my C5. I'd love to have them for the track but with my back trouble i just cannot be messing with hung up openers under a car. Any help on their reliability will be greatly appreciated. I have the LG Stainless Headers with RT Cats so i think i'd need 2 3" cutouts. I wonder if these open would gain me a 10th in the quarter? Anyone know?
I haven't had any trouble with mine, before I bought them I did a lot of research and they seem fine. C5 owner SpeedyZ has had them for many trouble free years.
I did not get a 10th out of them. No real gain. Maybe .5 mph but that could be from my tune tweaks. I should have some dyno numbers open and closed pretty soon.
Thread Starter
Tech Contributor
Joined: Jul 2002
Posts: 14,950
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From: St. Louis, MO
St. Jude Donor '08
Ran across my old thread this morning and I realize that I left a question open.
I did dyno my car with the cutouts open and closed. No real difference. Closed was slightly higher torque but < 1 rwtq so it's likely just variation in dynos. Here's a dyno sheet below.
Despite no perf. advantage, it's probably my favorite mod. It sounds bad **** with the cutouts open banging through the gears.
I did dyno my car with the cutouts open and closed. No real difference. Closed was slightly higher torque but < 1 rwtq so it's likely just variation in dynos. Here's a dyno sheet below.
Despite no perf. advantage, it's probably my favorite mod. It sounds bad **** with the cutouts open banging through the gears.
Melting Slicks
Joined: Nov 2004
Posts: 2,540
Likes: 1
From: Pineville Kentucky
CI 6-8-9 Veteran
I have cut-outs on my 66 Chevelle 427BB roller. These things are great!! I bought from DMH performance in Cincy, OH. if you are considering buying, check out their website. There is nothing like breakin' em loose with these cut-outs cracked to turn some heads and scare the H#$& out of some Rustangs!
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Ran across my old thread this morning and I realize that I left a question open.
I did dyno my car with the cutouts open and closed. No real difference. Closed was slightly higher torque but < 1 rwtq so it's likely just variation in dynos. Here's a dyno sheet below.
Despite no perf. advantage, it's probably my favorite mod. It sounds bad **** with the cutouts open banging through the gears.
I did dyno my car with the cutouts open and closed. No real difference. Closed was slightly higher torque but < 1 rwtq so it's likely just variation in dynos. Here's a dyno sheet below.
Despite no perf. advantage, it's probably my favorite mod. It sounds bad **** with the cutouts open banging through the gears.
However, I agree with you, I had a cutout on my cammed LS1 01 Z28 and it was my favorite mod. That car sounded so good with the cutout open, you can't believe how many thumbs up I got with it open.
Only issue with it is I had the cutout for over a year and I was just plain dumb lucky I never got a ticket. It would attract attention from a mile away and I probably opened it at least once per day.