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Full service, build advice, all through this quick little form. Fill this out and I'll help set you up with the best combination of parts! 

Transmission Quote Request

Looking to get the best rear end / differential setup possible? I can quote you with the proper gear ratios, tire size, etc.  

Rear End Quote Request


LOOKING FOR A DEALER/SHOP TO DO AN INSTALL? Go to my Authorized Installer page and find the closest dealer/installer to your area?


I WILL NOT provide technical assistance or recommendations for products bought from other vendors

**** PLEASE!!! I MUCH PREFER EMAIL! I am very good about responding to emails, so please email me I'll get back to you as soon as I can. You can call me, and I want to provide the best in customer service, ***BUT*** please understand I do the sales, tech calls, fabrication/welding, installs, and the shipping... so please respect my limited time****

By Phone:

1-866-GO-MANUAL (866-466-2682) 

+1 (814) 317-3157

Monday-Friday 9AM-5PM

Physical Address:

Grannas Racing
1245 Plank Rd
Duncansville, PA 16635

Use this form to send me a message and I will get back to you as soon as possible.