aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L fits_2018-2021`Ford`Mustang Cat-Back Single Rear Exit with

Cat-Back Single Rear Exit with Twin 4

go resonated

One-Piece Heat Shield: Sturdy 18 Gauge Powder-Coated One-Piece Heat Shield blocks performance-robbing engine heat

6in WB 3in Optional Front Muffler

Part is 33

aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L fits_2018-2021`Ford`Mustang Cat-Back Single Rear Exit withaFe 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