Butch Peyton

There is only 1 version for the 19+ platform. On a 6.2 l87 as mine is, it only gained 17 hp on the 93 tune that was only noticeable in the higher rpm range. All I'm saying if I had to buy it, I'd pass.

I beta tested this for Diablo a couple months before release to the public in my 2020 6.2 and wasn't impressed at all. There was a small noticeable power bump at highway speeds but not so much down low. Needless to say, I have since put mine in the shop deleting DFM, Johnson roller lifters, GPI Stage 1 high lift cam, BTR springs, hardened push rods, heads ported, intake ported and tuning.

GPI is doing all the work. Dyno tuning ecm and tcm, head porting, springs lifters and pushrods, DFM delete, intake porting, headers with catted Y pipe and trying to pony up for the whipple but funds may not allow. I still have a few weeks before dropping off so maybe I can pony up those funds.

I currently have Borla S-Type cat-back on my truck since new. Sounds good now, but having my Kooks headers with catted Y pipe installed. I'm certain it's going to be to loud for my liking. Anyone run in to this and if so what muffler did you go with that tones it down. It's getting tuned, dfm delete, cam and heads worked over.

I currently have Borla S-Type cat-back on my truck since new. Sounds good now, but having my Kooks headers with catted Y pipe installed. I'm certain it's going to be to loud for my liking. Anyone run in to this and if so what muffler did you go with that tones it down. It's getting tuned, dfm delete, cam and heads worked over.

Any updates on how yours is holding up in regards to trans and motor in general?

I have a 2020 Rst 6.2 that is out of factory warranty. So time to go wild. Goes to GPI in November for some motor work and tuning. I have read it and it was confirmed today by the dyno shop that they will not dyno to its capacity due to drive shaft chances exploding increases and has happened. Anyway has anyone here replaced their rear drive shaft with a more capable shaft and where to purchase.