Product Description
The 3.5 inch exhaust is used on High Output (HO) engines such as all GT-40 engines and engines labeled High Output (HO) from 1991 on.Please verify if you have a 3" or a 3.5 inch exhaust. Note: the manifolds are the same for either size riser.
The 3.0 inch riser is part no. R029001 and is generally used on PCM manifolds prior to 1991.
The 3.0 inch riser is part no. R029001 and is generally used on PCM manifolds prior to 1991.