Does anyone have a NAPA belt number for a 19% pulley install

 

Do yourself a favor and get the Goodyear Gatorback belt!

It's a lot better than NAPA belts and its grip is amazing!

Check this thread for more infos and part numbers...

https://www.northamericanmotoring.co...ight=gatorback

 

What belt size would be used for the M7 16% pulley?

 

The same as with a 15%....

 

i purchased a Goodyear Gatorback #4060537 for my M7 16% set-up and I hope to install both next week-end. i assume it will fit fine. i am told the JCW belt also work well with the M7 pulley. all unconfirmed by me personally at the time of this post.

 

Thanks for the info, I found my missing belt, it was a NAPA belt, I installed it anyway, I will switch over to the Gatorback next year. I feel with the 19% pulley it should be changed every 12 to 18 months, (personal opinion).
BTW, the 19% pulley is fantastic, mid range pulls like a bear, and the Whine is really pronounced now!!!

 

Please post about your experience (belt fit as well as the performance from the 16% M7 pulley). Also, do you have any other engine performance mods? I am seriously considering the M7 16% pulley.