SSDiesel Supply Chip...

[6.5SmokeStack]

The 40HP version works well with stock exhaust. The 80HP version requires a modified exhaust such as our 4" system, and full gauges, EGT and boost.
I have stacks on my truck, the 90 Degree Elbow is 4" what would I need to get to replace the 3" Cat up to the turbo back? Do you guys know what I mean?

[christja]

3" is the biggest down pipe that will fit, im puting is 3 1/2" after that and im gonna get the 80 hp chip. it should be fine.