how much power

solorider

do you think i will get by fittin a dual silencer (centre and rear box) straight through cat back system (2" bore),removed precat and i will be getting a performance panel filter and derestricting the air box with a vectra c air pipe?

JohnnyN

You'll probably be lucky to see an increase of 5bhp. There's a good system in the Classifieds at the moment. Its a full Piper system including downpipe and 200 cpi sport cat.

http://cgi.ebay.co.uk/Astra-G-SRI-2-2-F ... 2c5ac806bf

poundy

JohnnyN said:
You'll probably be lucky to see an increase of 5bhp. There's a good system in the Classifieds at the moment. Its a full Piper system including downpipe and 200 cpi sport cat.

http://cgi.ebay.co.uk/Astra-G-SRI-2-2-F ... 2c5ac806bf

surely you want at least 2.5" dont you to see any real gains?

JohnnyN

Moving to a 2.5" system was the most noticable gain in one hit when my engine was NA. The torque increase was great. The system was Milltek.

solorider

to be honest i originaly bought this system as it looked like a direct replacement for the original,there was no mention about it being a performance system on the ebay ad,when it turned up it did mention performance exhaust on the box,i only paid £148 delivered for it and is marked as toyosport,i was not realy after a performance exhaust but it is fitted now,i dont know how loud it is yet as i have not started the car yet after a cam chain faliure (i bought the car like that) here is the very system i bought http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 3D1&_rdc=1