JMP

you get the gear/diff ratios, rolling diameter etc and do the math to work out the torque multiplication, then work backwards from there.

is that Scott from Insight?

He did a top job on my car.

My ceramic coating was done by Competition Coatings in QLD, haven't had any done by their Sydney branch. The stuff I had done was $240ea for the Extreme coating on two small turbo manifolds... The coating cost more than it cost me to make the manifolds I did the header wrap myself on the GT-spec headers my forester run after the first lot of wrapping perished/melted. Have also done some other N/A headers I've made and dump pipes etc. Another tip is to spray the header wrap with heat resistent paint after wrapping. Dont do both, the header wrap will wreck the ceramic coating. Ceramic coating wont help with the sound of the headers at all, heat wrap might dull the sound a little.

Cermanic coating or heat wrap will do SFA in helping your car pass the emissions test. Only getting it tuned with the specific goal of passing the test will get it through. I've got the turbo manifold ceramic coated on two of my other cars, the headers on my forester are heat wrapped. If you're going to do anything with them I'd go with the heat wrap first, the headers shouldn't crack in the near future. The header wrap isn't too expensive from VPW, $68 for the 15m x 50mm wrap... you'll probably need a fair bit to do your extractors as they're so long. Soak the wrap in water prior to applying it and wear gloves to reduce the itch. If you go wtih ceramic coating, it will probably cost in the $400 region to get done. I had my last lot done by competition coatings.