The out of the box MSD runners and port alignment leaves a lot to be desired. We port the entry transition from the throttle body flange to the plenum, as well as the manifold runners. The manifold is completely disassembled for this. Runner Taper is verified and any casting flaws from the manifold production are removed.
*We recommend taking the top off the intake, clean thoroughly, and test fit on your engine to validate port alignment prior to final installation *
*We recommend taking the top off the intake, clean thoroughly, and test fit on your engine to validate port alignment prior to final installation *
GPI Hand Porting
Please include a copy of your order confirmation with the manifold and ship to:
Gwatney Performance Innovation
ATTN: PORTING SERVICE
200 Municipal Dr
Jacksonville, AR 72076
501-985-4947
Please include a copy of your order confirmation with the manifold and ship to:
Gwatney Performance Innovation
ATTN: PORTING SERVICE
200 Municipal Dr
Jacksonville, AR 72076
501-985-4947


Service was quick.
Great job porting they definitely took their time and did amazing. Near perfect porting on the runners.
Looks amazing and fast service
100% happy customer. Excellent job!
The porting was very clean. I won’t know the results until I get my car dynoed