Allison 5/8" 1200 PSIB Transmission Cooler Lines & Adapters Compatible with 2001-2010 Chevy/GMC 6.6 LB7 LLY LBZ LMM Duramax Diesel 6.6L

Easy to install, way easier than installing OEM. They seem like they're durrable, but they've only been installed for a couple weeks, about 2k miles. No leaks.Only reason they aren't 5 star is the washers that are supposed to seal the heat exchanger in the radiator end, aren't coned, and even if you press them into a cone shape, they're so soft they don't apply good pressure to seal those two connections. I got creative, and they worked just fine

Product is good and item arrived on time. Great experience with seller.

I installed these lines on my 03 Lb7 truck. The reason I only gave this product a 3 star review is because the line that goes to the bottom of the radiator could of been made 8” shorter and the fittings that go into the radiator leaked As soon as I started the truck. The only way I could get them to stop leaking after multiple attempts was to install bigger orings and to put some Teflon tape on the threads.

I ordered these lines for a 2001 GMC sierra 2500 Duramax my stock line was leaking so I figure I’d buy the whole kit and do them all. the lines seem to be in good quality but they don’t send the correct fittings and I went everywhere looking for fittings can’t find them total waste of time

Product was nice, except the product DID NOT come with installation instructions. All other companies who supply Transmission Cooler Lines, include instructions. There are 3 different hoses and multiple fittings that need to be installed at exact locations, and if you are not familiar with vehicles you may have install issues.

Fit great and great quality. No more leaks!

Didn't come with all the fitting had to find radiator fittings. But other then that work well

Good price and a lot of fittings. Hoses were a little too long.