Exhaust bypass valve failure....
2. If you want to send us the OEM system we can happily weld in a new valve for you
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Stuart Dickinson
Managing Director
Velocity Automotive Performance Limited
206 Maple Avenue
Oliver, BC
Canada V2A 4W6
Office: (1)250-485-5126
www.velocityap.com
Stuart Dickinson
Managing Director
Velocity Automotive Performance Limited
206 Maple Avenue
Oliver, BC
Canada V2A 4W6
Office: (1)250-485-5126
www.velocityap.com
Registered User
Joined: Jun 2016
Posts: 1,508
From: South Jersey
Rep Power: 76
You've never pulled the fuse? I didn't for a couple years, then pulled it. Then put a QS-SS+ in it. It is a little raspy over 4k full throttle but sounds so much better normal driving.
Registered User
Joined: Jan 2021
Posts: 48
Rep Power: 0
This is one of the distinct differences between the 4.3 and the 4.7. On the 4.3, 200 cell cats (no secondary cats to delete) make a huge difference in sound, even with the factory mufflers. I added a Velocity x-pipe to my 07 as the tone with the 200 cell cats installed was quite raspy. It helped smooth things out a bit, but there is still a lot of rasp. The 200 cell cats are currently on a shelf while I debate reinstalling them.
Sent you a pm too but are you still interested in selling your high flow cats?
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John@SpeedTech
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