Its about 5" in diameter, gonna fill it up with a black stack!

Where can I get a clamp/bracket to mount the stack to the bed to keep it from moving around?
Like something that would mount to the upper lip of the bed.

 

http://www.chromeroomstore.com/servl...ounting/Detail

here you go. this is exactly what you need. it has holes to mount to bed with like regular 5/16 bolts.

 

You can just use a regular exhaust u-bolt clamp bolted to the front lip. Cheap and dirty, but it works.

 

well i got that darn hole fixed! Now i have another problem, my face is sore from grinning so much! I wish I had put a stack on here a long time ago.

While we were "trying it out" My buddy and I ended up having a little street race, Me in my 24valve, and him in my 1st Gen so I could hear the stack. He put 4 truck lengths on me really quick from a 50 mph roll. He was in 5th, I used 4th and 5th! We only raced till about 80, but the outcome was obvious.

One more thing, exhaust temps are down 200 degrees vs. the straight piped stock diameter exhaust (cruising temps)!