aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L Throttle Body Spacer This system features a 4"

This system features a 4" Black Chrome on T-304 stainless steel tip

Finishing off this exhaust system is a 4 IN diameter black 304 stainless steel clamp-on exhaust tip

This quick and easy plug & play SCORCHER HD module adds significant power by increasing fuel pressure to improve vehicle efficiency

graphite impregnated bushings

aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L Throttle Body Spacer This system features a 4"aFe Twisted Steel Header SS 409 HDR Jeep Wrangler YJ 91 99 I6 4. 0L The new Twisted Steel performance header from aFe Power is redefining the header industry with new pulse control technology. aFe engineers have designed this header using optimum tube lengths and mitered collectors for maximum flow and velocity for power delivery across the entire power band. Combine with a large 1 2" thick head flange and 14 gauge 409 stainless steel tubing, you have