aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L Engine Components>Throttle Bodies View the 21-759C vehicle applications

View the 21-759C vehicle applications to determine the legal status for each vehicle

View the 21-788C vehicle applications to determine the legal status for each vehicle

and it delivers 100% more flow at the stock 58 PSI base pressure (202lph AEM vs 100lph stock)

With a design height range of 6

Its progressive layering allows the filter to flow at high levels even when dirty

aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L Engine Components>Throttle Bodies View the 21-759C vehicle applicationsThe 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 a header that is strong and powerful. Twisted Steel headers are 100