hi

just asking a few questions

1. would just adding extractors to a ts magna 3 litre auto with standard exhaust give it more power and be better on fuel or would the pipe from the manifolds to the cat converter need upgrading too

2. would just adding extractors to a ts magna 3 litre auto give it more power and be better on fuel or would the exhaust need upgrading too

3. theres a rumble comming from the exhaust, has new back muffler but middle sections probably original still, join that joins the rear and middle section doesnt have a leek, would it be the middle exhaust or just a gasket at the cat converter or manifolds