Its worth wrapping the Downpipe and the exhaust, because it helps hot air flow, I wrapped my manifold right up to the turbo but was told, this was bad due to the
extreme tempretures created in the exhaust housing and it could in-turn melt the
exhaust wheel. So just the bit closest to the engine is wrapped and the rest is
exposed.

Exhaust wrap is about £15.00 a roll if i remember...

Al...