hey,
I was wondering if it is o.k. to drill alot of 1/4 in diamiter holes in the back of the exhaust pipe on my grizzly. i would remove the spark arrester, then reinstall it when i'm done. kinda like a poor mans muffler exchange, lol? my thought was to open up the exhaust for free flow? will it work?
thanks for the replys!!!


my pictures

 

Check my pics and tell me... lol Yes it makes a huge difference! I went a little farther and added a 1-1/2" outlet instead of the reduced outlet it had stock. I am thinking of increasing it to 2" soon, just to see if it gives it more [img]i/expressions/face-icon-small-happy.gif[/img]
Also I used a 1/2" bit and drilled 10 holes... if you space 'em right you can fit 14, as I've done 2 since with the max amount of holes. You will need a loooong drill bit, check it before you go to the store to buy one.

 

I'd put it this way detroit doesn't try to use 3/4" exhuast pipes for 41hp motors, in fact most hundred pony cars use 1 3/4", that's with much smaller exhuast pulses too (4cylynder.)