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#1
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GTO Exhaust Complete
I am finally getting the GTO back on the road and crossing things of the Goats bucket list. The exhaust was one of the last big items.
My criteria for the exhaust system: 3" 304 stainless steel, Kooks Race Series Bullet mufflers, tucked quarter tailpipes with turndowns. Currently no system being made that fit this criteria. While there is a few stainless systems on the market, they are all designed for an offset muffler, and the Kooks is a straight through design. So we built a system utilizing a Pypes x-pipe and Stainless Works "grab bag" for all the various bends. This is the result after hours of mocking, fitting, cutting, and welding. Hope you guys enjoy.
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1969 Verdoro Green GTO #Matching 400 + .045, 4.21 Ohio Forged Crank, SD 290 KRE heads, Torker II, OF Cam, Etc... 1978 W72 Marty Blue T/A GONE |
#2
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A few more.
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1969 Verdoro Green GTO #Matching 400 + .045, 4.21 Ohio Forged Crank, SD 290 KRE heads, Torker II, OF Cam, Etc... 1978 W72 Marty Blue T/A GONE |
#3
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T/A, that is one clean installation. And the Vedoro Green looks great. I gotta ask, do you have any exhaust drone with the X-pipe? At any certain RPM's? I have seen issues with that discussed on this website.
Thanks Tony |
#4
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Great job, that's a lot of work and patients.
My father runs a system with similar ideas on his 69 GTO but with straight through designed case style race mufflers. 3 1/2" off the headers into a Dr. Gas X that changes to 3". From there the oval case straight mufflers are turned at a 30 degree angle to compensate for a factory tailpipe fit. We used Torque Tech for the tailpipes because they also had factory looking turndowns at the bumper that tucked up into the quarters nicely. It's hard to get that factory appearance while trying to gain performance. Almost looks like 2 identical cars. Last edited by Formulajones; 05-15-2017 at 10:27 AM. |
#5
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Tony: there is a bit of drone around 2200 RPM but I was expecting it. I have previously run these same mufflers as a Kooks axle back setup on an 06 GTO and loved the sound, but knew there was some drone associated with it.
Formula: My original plan was to do something very similar to your dad, as I have heard great things about both those products. But having a friend that can tig weld, who was willing to help, swayed me towards stainless. Thanks for the kind words guys!
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1969 Verdoro Green GTO #Matching 400 + .045, 4.21 Ohio Forged Crank, SD 290 KRE heads, Torker II, OF Cam, Etc... 1978 W72 Marty Blue T/A GONE |
#6
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Nice setup! A soundclip would be appreciated.
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Reef turqoise -66 GTO Firebird Convertible -68 R.I.P. -73 LeMans 350/350 Barnfind |
#7
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Really well done! Very nice!
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--------------------------- Fool Around, Get Hurt, Don't come Crying to me. |
#8
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Quote:
Some will vote for Dynomax Super Turbo mufflers and I will agree they have less drone but I don't consider them a full performance muffler. They are crimp bent instead of welded and do not have a straight flow path.
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--------------------------- Fool Around, Get Hurt, Don't come Crying to me. |
#9
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Thanks for the kind words guys!
I'll try and post a sound clip in the next couple of weeks. I am currently in the DFW area for work while the car is in Houston. So needless to say, I don't see her much. There is some drone, but it's livable in my opinion. Given that the car isn't a daily, I was willing to compromise for sound.
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1969 Verdoro Green GTO #Matching 400 + .045, 4.21 Ohio Forged Crank, SD 290 KRE heads, Torker II, OF Cam, Etc... 1978 W72 Marty Blue T/A GONE |
#10
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I'll be in Houston next week. I'd be glad to give that TA some exercise!
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--------------------------- Fool Around, Get Hurt, Don't come Crying to me. |
#11
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Haha!! You are too kind sir.
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1969 Verdoro Green GTO #Matching 400 + .045, 4.21 Ohio Forged Crank, SD 290 KRE heads, Torker II, OF Cam, Etc... 1978 W72 Marty Blue T/A GONE |
#12
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Finally got a chance to recording a short idle clip. Should have a drive-by video shortly.
https://youtu.be/9hAB8anG0sw
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1969 Verdoro Green GTO #Matching 400 + .045, 4.21 Ohio Forged Crank, SD 290 KRE heads, Torker II, OF Cam, Etc... 1978 W72 Marty Blue T/A GONE |
#13
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Very NICE!
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