Decat pipe differences

[subseamatt]

Considering getting some decat pipes for the Tamora (standard 3.6).
● Is there any real performance or sound difference between the "normal" TVR decat pipes compared to the snazzier aftermarket smooth trumpet ones?

I.e. these ones from TVR parts which are essentially normal cat cases but without the materials inside:

https://partsfortvrs.com/tvr-parts/part-details/tv...
(Cheaper, looks like a cat for MOT etc, not so pretty but i cant see them unless jacked up anyway, unlikely to corrode through in the next decade or so)

Or these type ones from ACT or CliveF etc:
https://www.actproducts.co.uk/product/sjd03-speed-...
(More expensive, marginally better flow?, obviously decatted, stainless looks/lasts better but unlikely to matter for low mileage over the next decade or so and i cant see them anyway)

[astonman]

There will be a difference,the ACT/ JP ones or the PDQ ones, do actually flow .The " open " ,cat old pipes with no Cat are awful in terms of flow,but you may not notice the difference?

[Granturadriver]

Sorry, I can't tell you whether there are differences between the various De-Cat pipes. I was disappointed with the parts I had in it (3.6). Yes, it was noticeably louder, especially at high revs like the trumpets of Jericho. But it also sounded a lot tinnier in the engine bay, not really beefier or better. Also, the pipes to the exhaust didn't seal properly. So I always had exhaust smells. In the end I switched back to the Cats.

[m4tti]

subseamatt said:

Considering getting some decat pipes for the Tamora (standard 3.6).
? Is there any real performance or sound difference between the "normal" TVR decat pipes compared to the snazzier aftermarket smooth trumpet ones?

I.e. these ones from TVR parts which are essentially normal cat cases but without the materials inside:

https://partsfortvrs.com/tvr-parts/part-details/tv...
(Cheaper, looks like a cat for MOT etc, not so pretty but i cant see them unless jacked up anyway, unlikely to corrode through in the next decade or so)

Or these type ones from ACT or CliveF etc:
https://www.actproducts.co.uk/product/sjd03-speed-...
(More expensive, marginally better flow?, obviously decatted, stainless looks/lasts better but unlikely to matter for low mileage over the next decade or so and i cant see them anyway)

The ACT’s aren’t really like Clive’s.

Clive’s have a much more progressive taper and less “pipe”. If you can get Clive’s still, buy them.

[subseamatt]

Thanks for the replies so far...Well...
Based on the above and the responses to my same post on Facebook...
https://www.facebook.com/groups/1506759549556031/p... (group members only)
I now don't know whether I'd be better leaving the cats in and getting a sports exhaust instead! (Definitely don't want decat AND sports exhaust!).
I was planning the decat option to help reduce heat as a bonus, but just not sure now. I suppose I could still try the decats and sell them on without too much financial impact if I dont like it....
Time to start looking at alternative sports exhaust options now too!

[glow worm]

Why do want to decat ? OK you may get a few more horses , but do you need them ?
You're likely to have MOT problems, you should really get a decat mapped chip in the ECU or a remap once decatted.
If you want to reduce engine bay heat , you would be better Zircotec coating the manifolds and cats ( cost you but looks good ).
Or do you just want to make a lot of noise ? Which soon or later will annoy you to hell

[clive f]

I still make and supply the hi flow decat pipes, and now also make and supply 200 cell sports cats, so more noise over standard cats, slightly better engine breathing and being 4" diameter instead of the standard cat being 5" diameter more room for airflow around the cats to help reduce engine bay temps, O`h and passes emissions tests to.

https://www.facebook.com/clivefppa/

[lee02]

subseamatt said:

Considering getting some decat pipes for the Tamora (standard 3.6).
? Is there any real performance or sound difference between the "normal" TVR decat pipes compared to the snazzier aftermarket smooth trumpet ones?

I.e. these ones from TVR parts which are essentially normal cat cases but without the materials inside:

https://partsfortvrs.com/tvr-parts/part-details/tv...
(Cheaper, looks like a cat for MOT etc, not so pretty but i cant see them unless jacked up anyway, unlikely to corrode through in the next decade or so)

Or these type ones from ACT or CliveF etc:
https://www.actproducts.co.uk/product/sjd03-speed-...
(More expensive, marginally better flow?, obviously decatted, stainless looks/lasts better but unlikely to matter for low mileage over the next decade or so and i cant see them anyway)

PM me I have some ACT decatt pipes I may be looking to off load