This will help a lot, http://www.newspeedmaster.com/html/ai_removal_kit.html

as will a set of jets 1 or 2 sizes bigger. Theses engines run as lean as possible, maybe a little leaner, to meet pollution requirements. A set of less restrictive mufflers will also help since the less time the hot exhaust spends in the pipe, the less heat will be transfered.

Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python