Bit like buying some 8inch wide mags and fitting your existing 6.5 inch tyres to them. Sort of a half hearted job and that may or may not give you noticable results.
I'm sure you might get some replies from people who have done it that suggest they have gained an extra 400HP etc but logic and general experience would suggest that your existing exhaust system would 'choke' the benefit of fitting extractors.
If you are going to do something, do it right the first time.
AU1 XR6 VCT IRS
Never hold a Dustbuster and a cat at the same time.
Depends what you want fron them, I have only done extractors and I have notice a difference, but I mainly use the car for towing work or long distance cruising, I not after the last extra kw at the top end. If you want that you will probable need to do the whole lot. My improvements are aim for increasing performance and fuel consumption in the 2000-2500 rpm band.
Originally posted by z0s0 Looking at buying a set of these...can i just bolt them on to my stock exhaut for the meantime? will improvements be noticed?cheers
Been there done that!!!! DONT DO IT!!!! I added Pacemakers to my AU and a 2.5' sports cat and it did JACK!!! Wasnt till i added a sports exhaust to the combo that i noticed anything.The place where i got my exhaust done said that if id come and asked them about extractors they would have told me to forget them and just get the exhaust and at a later date add the extractors.
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