My donut-less 3" down pipe. Works great with no leaking

[GLHS60]

I ran my car for over 10 yrs with no exhaust donut and had no problems.

My brilliant ex. guy Tim came up with the simplest solution imaginable.

I wanted to run a full 3" exhaust with no neck down at the swing valve.

He said no problem and found a flange that would accept the 3" pipe.

He welded the pipe to the flange with some pipe sticking into the SV

The flange was the proper distance from the SV to use OEM fasteners.

I forgot all about this until I pulled the Engine a while back to refresh.

There was a witness mark on the SV where the 3" pipe was touching.

My Engine mounts were urethane filled so my Engine didn't rock much.

Still, the witness marks indicated just how much the Engine did rock.

There never was any hint of exhaust leak/noise and I ran full exhaust.

Thanks
Randy

[chromguy]

So he expanded the pipe to copy the donut shape....nice

[GLHS60]

It's actually just the 3" pipe sticking straight through the flange Miles.

No donut shape at all, just the end of the pipe slightly beveled inwards.

He simply beveled it by hand using his regular old shop bench grinder.

The bevel nicely matches the contour of the swing valve to seal.

Sadly, I'm not using it this time as my Turbo only has a 2/14" SV

Forgot to check the fit until it was too late to find a 2 1/2" SV.

Thanks
Randy