Ceramic coating or thermal wrap may net you a slight gain by reducing spool up time. For mine, I designed my own manifold which I'm having fabricated by a local motorcycle shop that specializes in turbo installations.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250