I wouldn't go for poly bushes unless you're tracking it. There's info on fitting S3 bushes that are OEM +, think DH fitted them?
Replacing worn old parts with new ones will make a vast difference before you fork out for "performance mods".
Lower it 40mm, K&N panel filter, 4 branch, 2 box 2.25 exhaust, WUR mod, ported T/b should produce a comfy 150bhp.
However,
Fit an ABF 2.0 16V motor.
would have the same effect and better fuel economy, more torque and tuning options.
