Outer Limits 4x4 Board

Wanted to find out opinions on different types of extractors and 2.5" exhaust systems for a TB42. I've heard Pacemaker are the go, but is there much difference between the brands ?

Others have said go the 2.5" and don't bother with the extractors, can anyone clarify ?

There is a member called Mr Exhaust on this forum who could answer that. Do a search and you will locate him.

read this

http://carl.outerlimits4x4.com/viewtopic.php?t=69303