This kit cannot be ordered pre-trimmed for a specific wheelbase. MBRP includes an extension pipe for longer wheelbase trucks and cutting instructions for shorter wheelbase trucks. If you have a SuperCrew Cab 5.5ft bed truck with a 145" wheelbase, you would not need to do any trimming. You would simply not use the extension pipe and install the exhaust as-is. If you have a SuperCrew 6.5ft bed, you would need to use the extension pipe, but would likewise not need to trim. Only 133" and 126" wheelbase trucks require trimming.