My question is you claim 40-55 hp gain on the 7.4l , and all the other tuners on the internet only claim 20-25hp gain, will I really see 40-55hp gain with stock engine, exhaust, and air filter? Also how much benefit do you think I would gain by going aftermarket catback exhaust.

Michael Moore
817-694-3652 ( michael moore, 11/29/2019 )
Our tuning is based off of extensive dyno testing of RV's, and while results may vary, our gains are generally higher than others due to our expertise in the tuning of the L29 7.4L.
Alright Jay! How much will the customization cost me? ( 11/05/2019 )

It is $495 if your sending your core/pcm in first. Feel free to call me with your vin # handy if you would like to get your order in.  800-417-4559 Jay

https://www.ultrarvproducts.com/UltraPower-GM-Workhorse-7.4L-(454)-Custom-Tuning

My car is GMC pick-up 7.4L 1998. it is manual transmission. It is not 4x4.

I do have a questions.. Can I send my original PCM to you to customize it and send it back to me?

Thanks, ( 11/03/2019 )

If it is a 1998 then yes you can. If you send it to us you avoid paying the core charge. We would reprogram yours and put it in a new case so it looks nice! If you would like to place your order feel free to give me a call at 800-417-4559. My tech who does the programming is out of town this week so it would get done first thing next week if you wanted to go ahead with it.

Jay

Hello there,

My car is GMC pick-up 7.4L 1998. it is manual transmission. It is not 4x4.

I do have two questions..

1- Does this product work with a manual transmission?

2- My car is stock, will this product work on it OR I have to customs my engine first?

Thanks, ( Ali, 10/29/2019 )
Yes, we can tune your engine for more power, doesn't matter what type of transmission. This is perfect for an otherwise stock engine as the gains are the best bang for the buck by far.
Would this work on 1996 7.4L L29? Is it not the same motor from 96 to 2001. If it does work what would do for pulling and climbing hills? Thanks ( Le Fannin, 10/09/2019 )
We've had a lot of issues with 1996 & 1997 PCM's so for the moment we are not tuning those.