The 2.25" X-pipe fits OVER a 2.25" ID exhaust. A 2.25" ID pipe will fit sloppily over our 55mm pipes so you need to build up the 55mm pipes to seal into 2.25" and then install the X-pipe over the 2.25 pipe. Been there, done that, no fun. Lot of weld filler.

 

My exhaust guy built an entire center section with the X-pipe integral to it. He also put factory-type connections on both the front and rear so I can easily swap back to the stock center section, which I kept. He used all 2-1/4" stuff.

 

These are the ones I get made locally.

They are done in 2.5" and the ends are swaged to match the 55mm factory pipes.

For whatever reason 2.25" tube is 50% more expensive than 2.5" around here, and in much shorter supply.

 

It's because bigger is better don't ya know...

 

Had a girl tell me that on our last date....

 

That's a terrible way for a girl to end a relationship...

 

Besides getting new cats any ideas on reducing the low down rasp of my exhaust
Any suggestions ??

I'm thinking the rasp is obviously due to 100 cell cats and the fact they used mild steel instead of stainless on the down pipes

 

Just throwing this out there, as I don't have any experience in the area... but if you think some of the rasp may be due to the type of metal used in the pipes, maybe increasing their mass might reduce the vibration of the pipe itself.
What I'm thinking is take a heavier piece of pipe, split it, and use hose clamps to strap the pieces around the current pipe. Alternatively, strap some heavier metal bars to the pipes, to increase their mass, and reduce their vibration frequency.
The idea might be full of crap, but then, so am I.

 

Was kind of thinking the same thing but using a heat wrap

 

This talk of adding mass to the downpipes reminded me of this thread, though it's for vibration, not rasp in the note. Bracket part numbers on this thread.

 

To kill the rasp you'll need to capture the high frequency sound. Capture the frequency on video, analyze it and build a Helmholtz resonator to capture it. That's what I did for my drone problems and it actually worked.

You could also add a small pair of glasspack style resonators to the mid pipe.

 

Might try the heat wrap out first see if actually reduces the raspy tone

 

The wrap would make the temps through the pipes higher which increases the speed of sound and will change the pitch a little bit. It's also horrible on the metal plumbing and not recommended if not needed.

Cavity Resonance

calculator
Cavity Resonance