How much gap to leave around grp bonnet when trimming for exhaust?

[adrianreeve]

Hi there, how much of a gap is it good to leave between a grp bonnet and exhaust headers when trimming the bonnet to fit the exhaust?

Cheers

Adrian

[flyerncle]

Adrian,have a look at Spuds update from Cadwell and you will get an idea of how close you can get,the manifold is wrapped to cut down under bonnet heat.