I'm thinking about having a bespoke system made for the Zed in the not too distant future, from the turbos back. :)

 

What's the popular opinion (and pros and cons) regarding a full 2.5" system, or a full 3" system...?

I'm of the opinion (someone correct me if I'm wrong) that a 3" system will give better flow and power, I think it may depend on what engine mods you have, I had an APS 3" turbo back system on my Evo 8 and it gave a proven 30bhp extra! Cost £1200 at the time!! My Abflug is a 3" cat back and I've the Japspeed 2.5" downpipe and centre section, I'm contemplating getting those pieces swapped out for 3" also (funds permitting):thumbup1:

I think someone here got a custom 3" exhaust from Infinity exhausts, they're based near Jimmer (Powerzed) and look to be built to a very high standard:thumbup1:

I think someone here got a custom 3" exhaust from Infinity exhausts, they're based near Jimmer (Powerzed) and look to be built to a very high standard:thumbup1:

 

That would have been Kaza Steve and yes, Infinity Exhausts in Bristol - very good quality.

I'm thinking about having a bespoke system made for the Zed in the not too distant future, from the turbos back. :)

 

What's the popular opinion (and pros and cons) regarding a full 2.5" system, or a full 3" system...?

 

Have a read of this post by Greg@SZ. Amongst other things he covers exhaust sizes:

 

http://twinturbo.net/net/viewmsg.aspx?forum=general&msg_id=2415470

Where you getting it done at?

 

I can highly recommend AAS in Newcastle.

3" exhaust is generally louder (depending on the muffler) if you can stand the extra noise. Mine sounds really nice at first but gets droney after a while on the motorway :D

Have a read of this post by Greg@SZ. Amongst other things he covers exhaust sizes:

 

http://twinturbo.net/net/viewmsg.aspx?forum=general&msg_id=2415470

 

Thanks for posting that, Andrew. Having read it, it seems to me that the suggestion is that 3" pipework from the turbo to the H-pipe with a 2.5" system after that is the best compromise between noise and performance.

 

Not something I'd previously considered.

 

Where you getting it done at?

 

I can highly recommend AAS in Newcastle.

 

Are they on Scotswood Road, Al? If it's where I'm thinking of, they did some work on my old Celica SS-III and I couldn't fault them :)