Standard y-piece decatted

[TJC46]

Tempted to remove the y piece and cut the cat out.

Anybody on here done this themselves ?

Is it as straight forward, as cut to open up, remove the cat, and weld back up ?

How does it affect the exhaust noise ?

Once the cat is removed that is a big open area below the bends of the y.

Do you alter that area internally or leave as is ?

I would love a Clive F y piece as i think they are real quality, but i need to sort a new roof out this winter so funds are a bit limited.

Thanks

Tom.

[Zippee]

IMHO they sound like a tractor if the main cat is removed like that. Totally different sound to clives y piece which sounds fantastic. Have you sleeved the rear box as that makes then sound great?

[tonys]

Try search as there's been loads on the various exhaust options over many years. The general consensus seems to be that simply removing the main cat does not provide the sound that people were actually hoping for. Some have fitted a restrictor inside after cat removal. However some like it so it's a purely personal choice.

Search should reveal options such as:
Remove pre-cats
Remove main cat (either with/without precats)
Sleeve exhaust, no wadding left in silencer box
Sleeve 50% of pipe, as above.
As above with varying amounts of wadding.
Various stainless manifolds
Clive Y piece
ACT Y piece.

Any combination of the above lot.

Some youtube sound effects as well

It's a minefield. Good luck.

[jojackson4]

As for tractor noise I say no and o have worked on many farms and I have never heard any resemblance to a st flicker

[Dominic TVRetto]

Interesting to see the internals of a reducer, bit won't there be the similar effect when it comes out the end of the cone into the massive exhaust "elbow"..?

Wouldn't cutting off that wide exhaust elbow and joining the funnel exit to the exhaust pipe with a consistent diameter curved joiner pipe provide more consistent flow/gas speeds..?

I know it might be more faff but surely only a hundred quid or so at a welders if it would benefit the end result..?

[jojackson4]

Dominic TVRetto said:

Interesting to see the internals of a reducer, bit won't there be the similar effect when it comes out the end of the cone into the massive exhaust "elbow"..?

Wouldn't cutting off that wide exhaust elbow and joining the funnel exit to the exhaust pipe with a consistent diameter curved joiner pipe provide more consistent flow/gas speeds..?

I know it might be more faff but surely only a hundred quid or so at a welders if it would benefit the end result..?

It was done like that so it looks standard
If I was not bothered about the look I would probably do 2 pipes into a merge collector and do away with all the V band crap