Is 2" best size for stock engine?

rushy

Senior Member
Ive been patching up my system for the last few years but its time to get it sorted properly. At the moment its the stock SE system with the NET's twin back boxes grafted on just before the Y. The SE with a single back box has a huge centre box, well over 1M, the YH which has twin back boxes has a very small centre box due to it having twin back boxes, and the NET has no centre box as the turbo quietens it down even further.

Anyhow, I have a set of Irmscher Quads with an Irmscher Y section, so all I need is the centre section from the cat back, on the vec C the cat is in the manifold, so it starts with the down pipe.

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I want to keep it nice and quiet so i'm at a loss on what to get. I presume 2 inch should be kept as the engine is stock and she's a heavy old girl so dont want to lose any low down grunt and posible a small centre box?
 
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