Intermediate pipes run from the header collectors; the catalytic converters will be installed onto the back of them. These pipes are a full 3 inches in diameter. SLP provides very nice Torca exhaust clamps for all of the pipe junctions. Just install them loose for now and wait until the entire exhaust is assembled to fully tighten everything. | 
The high-flow catalytic converters are then slid onto the back of the intermediate pipes. Make sure the heat shields face upward toward the car underbody (no point in shielding the asphalt from heat, is there?). | 
The two pipes joining the catalytic converters to the Cat-Back system differ slightly. The one up top has a slightly tighter bend and is a bit stubbier; it goes on the passenger side. The rear oxygen sensors will also install into these pipes. |
SLP provides new gaskets and bolts for the junction between the aft-cat pipes and the Cat-Back system. We tightened these bolts before tightening any of the Torca clamps; it helped things line up better. With these pipes in, the rear oxygen sensors can be installed into them. | 
The rear oxygen sensor extension harnesses provided by SLP snap right in and are zip-tied out of the way. The driver side sensor definitely needed an extension while the passenger side barely needed one at all. | 
One can now adjust the entire header system as needed and fully tighten all of the Torca clamps; hit them with an impact gun if you have one. We should point out that while other header systems for these cars have required "adjustments," like grinding of heat shield studs, the only adjustment we made was a slight grind to the extreme passenger side of the BMR driveshaft loop for a bit more clearance. Other than this, we didn't experience any interference at all anywhere around these headers. |