scorpion exhausts are rubbish and will make your car slower.the bore of the pipe going through the back box is smaller than the pipe going in.mongoose and magnex are better than scorpion.i had a scorpion pipe on my turbo cab and it was noisy as,took it to ava and they told me to get rid of it and get a mongoose,took it back and with a new non scorpion exhaust,the fuelling ecu matched to the chip and a bit cut out of the bumper it made 194bhp over 160 with the scorpion.put that on and its a downgrade not an upgrade.