Fit my 2001 Gmc 1500 4x4 Sierra perfectly. The clamps are very heavy duty, but don't hold very well...You need to tack weld every joint..Otherwise I would have given it 5 stars. And it sounds great, not to loud not to soft. And when you get on the gas it really sounds great..

817428 409s dual moderate
Hi,I am 67yrs old I put my truck front up on ramps then jacked the rear up til
the tires were just touching the ground.did not remove tires. I removed front
clamp nuts, should have used a tourch to heat broke off one nut.I used a air
chiesel to drive out stud. I then used a 2ft pinch bar to pop system out of
rubber hangers and then slid the complete one piece system out the front with-out
cutting it in half.I proceeded to install the system which fit perfectly.after hanging snug/loose aligned then tightened all clamps max using 3/8 drive air
ratchet then a couple of hand cranks. after about three weeks of casual driveing
went under and found the pipe that goes across rear pumpkin almost fallen off
I did not spot weld instead I retightened all clamps then prick punched the
connections.I then sprayed a paint spot to monitor the fits to see if there moveing
Iam handi caped walk with a cane this job took me a fun filled 7hrs by my self.

Come with 40 series muffler, this is the 3rd flowmeter system I put on my truck. I hope the 409 stainless last longer. Sounds great. Pipes were a little close around spare tire and axle.

Overall I like it, I had to modify it slightly because some of the bends were off. Sounds Great and flows way better than the stock muffler. A little too expensive for what you get in my opinion. I bought regular exhaust clamps the ones that come with it are junk.

I purchased the same kit 7 years ago but alluminized. That kit came with real clamps and hangers and it rusted so I purchased the stainless version. The sound and performance are 100% AWESOME, but the clamps and hangers suck! NAPA auto parts has the clamps and hangers for under $20. 10 stars for the system and 1 star for the clamps and hangers.