carbide bits and the little sanding rolls work good with die grinder, welding supply stores will have them and probably cheaper than the hardware store, porting the manifold will cool the exaust temps a noticable amount, i ported an aftermarket one and put on my brothers 24v and i think he said it dropped temps close to 200 when rly getting on her and helped with spool up


just take your time and go slow, keep the tool moving dont just sit in one spot it will dig down and make it hard to smothen out good luck keep us posted

 

found them at a local auto body paint supply house, worked 10xs better than the ones i got at sears, i will look at the welding shop next time im in there

 

Seen so many replies thinking about doing mail order exchange?????????? One weak turn around