Howdy!

[crzycowboy]

Just wanted to say Hey to everyone here at Cumminsforum.com I've been here for a short while lookin' around, and was approached to be a Sponsor! If you all have any questions About Grand Rocks Powerflow Exhaust Systems, and or Stack Systems, please ask away, or PM me if you wanna keep them off the Forums! Looking forward to helping you all out!!

__________________
GOT STACKS?
Josh Stewart
Call me at: 1-800-321-3674
Email me at: joshuas@grandrock.com
Visit us at: www.grpipes.com

Welcome Grand Rocks Seems to have a great Name for stack kits !

Glad to have you on the boards

Now for a Question....

Its been Stated that anything over 4" is a waste and it dont increase Flow or Lower EGT's Ect ,,, and has no added benifit over 4"

Whats Been your Findings on this ?

Thanks

DM

[crzycowboy]

Originally Posted by

Welcome Grand Rocks Seems to have a great Name for stack kits !

Glad to have you on the boards

Now for a Question....

Its been Stated that anything over 4" is a waste and it dont increase Flow or Lower EGT's Ect ,,, and has no added benifit over 4"

Whats Been your Findings on this ?

Thanks

DM

Thanks DM, we try to keep a good solid name here! MOST of our kits are 4" inlets, and a 5" outlet. On rare cases we can adapt to a customers special need of a 5" system. From what I have been told, (from customers) they have experienced quicker spooling, and lower EGT's. To these customers, they felt it was a benifit. It really depends on what type of modifications already done to said truck. I hope this answerd your question!

__________________
GOT STACKS?
Josh Stewart
Call me at: 1-800-321-3674
Email me at: joshuas@grandrock.com
Visit us at: www.grpipes.com

Sounds Good !

Thanks

DM