UKCRC Forum

Technical => Maintenance and Servicing => Topic started by: Sharky on May 30, 2025, 05:22 PM

Title: GD 427 MARK 3 Exhaust Down Pipe
Post by: Sharky on May 30, 2025, 05:22 PM
Good afternoon,

I have recently purchased a GD 427 & have discovered that the exhaust down pipe is cracked....probably why it's louder than most!!

Does anyone have a recommendation where to purchase a down pipe replacement? Thank you
Title: Re: GD 427 MARK 3 Exhaust Down Pipe
Post by: Austin21 on May 30, 2025, 09:30 PM
Depending on what engine and if your on underslung exhausts GD might have something.

Title: Re: GD 427 MARK 3 Exhaust Down Pipe
Post by: Sharky on May 30, 2025, 10:23 PM
It is under slung.... Thanks will try GD direct
Title: Re: GD 427 MARK 3 Exhaust Down Pipe
Post by: GDCobra on Jun 01, 2025, 10:33 PM
Is it stainless?  If so wouldn't it be worth welding?
Don't know how similar it is to mine (RV8 with underslung pipes) but there is not really a downpipe as such just a relatively short L section which goes between the vertical outlet of the headers and the horizontal main pipes.  If that's the piece which has cracked it should be save-able I'd have thought.
Title: Re: GD 427 MARK 3 Exhaust Down Pipe
Post by: Happy Jim on Jun 01, 2025, 10:46 PM
Which bit do you need? I have most of an underslung system (GD Stainless) kicking about taking up space!

Regards

Jim