Polished 304SS Heavy Duty Up Pipe Kit & Gaskets For 2001-2016 GM 6.6 Duramax Diesel 6.6L

My stock PS up pipe on my 09’ LMM was leaking at the EGR split so I figured I’d upgrade and finally delete the egr. These bolted right in place. I covered them in DEI titanium heat wrap to keep temps down. I also installed a 3” aftermarket downpipe at the same time. I was shocked at how much different it runs. Spool is much faster and power is noticiy up. I’m running a 70hp tow tune with full deletes, same tune for the last 50,000 Miles, but with these pipes it runs harder than before. Towing 10,000lbs I’ve noticed a 2mpg gain. No unloaded numbers yet. This was an easy install on a van but good luck on a truck, it’ll be difficult.

Driver side fit as it should. But passenger side was horrible 2 of the holes on the lower flange were drilled too closely, the indention for the downpipe was not in the right spot it was an absolute nightmare to install

Would not fit

2 years old , and they cracked, of course being 2years old cant hardly ask for exchange.. I’m not a metal guy but I didn’t think stainless would rust.