 LG offers these hefty plug...  LG offers these hefty plug wires to complement the header install. We also installed a fresh set of NGK TR55 plugs gapped to 0.035 inches. |  Here's how the finished header...  Here's how the finished header installation will look in the engine compartment. |  The 3-inch catalytic converters...  The 3-inch catalytic converters are so efficient, they give up only 3 rwhp over an off-road pipe. They also reduce harmful emissions and offensive exhaust odor. |
 To install the x pipe system,...  To install the x pipe system, slide it onto the header flanges but wait to tighten the clamps. You'll want slack in the system as you install the rear exhaust section. |  SW's 3-inch converter-back...  SW's 3-inch converter-back system also features full T-304 construction. It comes with free-flowing mandrel-bent tubing and your choice of tip configurations. |  The SW over-axle pipes mate...  The SW over-axle pipes mate perfectly to the 3-inch LG x pipe system. Exercise caution when installing these pipes, as the wiring harnesses are not very forgiving. |
 SW offers both straight-through...  SW offers both straight-through and turbo-style mufflers. I chose the throatier, straight-through variety. |  The wiggle room gained by...  The wiggle room gained by leaving the clamps loose comes in handy when installing the mufflers. A little finesse is helpful here, as it is a bit of a tight squeeze to get the mufflers into position. |  With the mufflers in place...  With the mufflers in place and the rest of the system close to proper alignment, you can begin tightening exhaust clamps. Start up front and work your way rearward, snugging the clamps only enough to hold each junction in place. |
 Take your time with alignment....  Take your time with alignment. There are many joints, and having one out of whack can make it impossible to get the tips aligned. Once you're comfortable the entire system is where it needs to be, go back and tighten all of the clamps. |  I chose SW's 4-inch, angle-cut,...  I chose SW's 4-inch, angle-cut, rolled-edge tips. Rather than uglify the rear with visible clamps, Sean tack-welded them in place. No more stupid-looking quad tips for D6C! |  Dyno testing revealed a total...  Dyno testing revealed a total gain of 29 hp and 28 lb-ft of torque. As you can see, the gain was solid throughout the rpm range. |