aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L Engine Components>Throttle Bodies Flow and Performance: aFe Power's

Flow and Performance: aFe Power's cold side tube is constructed from 3-1/2" and 3" mandrel-bent aluminum tubing for maximum flow then

ACT twin disc kits include a pressure plate

Magnetic Plugs: This cover incorporates a magnetic drain and deep reach fill plug to capture loose particles for maximum protection

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

aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L Engine Components>Throttle Bodies Flow and Performance: aFe Power'sThe 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