I've got a Lukey muffler fitted already and I wanted to improve the exhasut system by either fitting a redback system (minus muffler) or just changing the cat to a hi flow cat. (I have a feeling the cat is stuffed already anyway). I am favouring the hi flow cat idea but would like others opinions on what would be a better option. (either for petrol consumption or power).

Candarin

Go the cat and mandrel bend to your lukey muffler. (this would be more effective and probably cheaper in the long run)

All the redback system is without the rear muffler is mandrel bends and a single hotdog.

:stoopid:
Go the high flow cat with 2 1/2 inch piping to your lukey. You will get much more gains from this setup. may want to look into buying a hotdog with this setup though as the i've heard taking the resonator off will attract police, and is also illegal isn't it?