call Levi at Turbo Performance:
(208) 251-9141
I ran with and without an exhaust housing blanket and manifold blanket on my current ED 62/68 with a 13cm SS exhaust housing. Trust me, spend the $200 or so for the manifold and turbo blankets they flat out work and couldn't be any easier to put on. Any time I can reduce my spool time by 100+ rpm and have the turbo shoot off to max spool faster for $200 i'm doin it every time. That's just my opinion.