Decat down pipe and centre section, standard silencer on a classic? Curious as to how loud it would be?

 

Dont know about sound but would cause restriction.

 

Not bothered about that mate, the silencer is far far less restrictive than the cats. Just wondering how loudly would be

 

I had something similar on my ls p1, 3" open mouth decat downpipe to a 2.5" centre from TSL, the car had a tsl thundercat (think that's what it was called) back box on it, with a 5"'exit and I found it far to loud. Swapped the back box for an original P1 stamped back box (upgrade option) from the factory, so I can only imagine it was close to a prodive rear box and on normal driving the car was clearly louder I would say slightly above a ppp or prodrive car but on full beans was perfect in my opinion, had a real burble to it but not right up in your face

Boy I miss my old p1, should never of sold it

 

Thanks bud that was the answer I was looking for! Mine sounds dry load so I think it is blowing a bit. New gaskets methinks

 

I would not suggest it on a standard sti box as these inassume would be very restrictive, agreed not as much as the cats but still. Go for a ppp / prodrive box if you want something original. There are plenty of quiet boxes out there, you don't have to settle for a nur spec. Must be getting old or something but a subtle sound on idle and town driving is my view but has to sound good when your on it