WebFeb 20, 2006 · When jeep went to the 4.0, they also added FI....that was the real key to the HP improvement. The HO head flows a little better than the non HO...but the diff is only about 15 hp. You won't be able to use your old intake or … WebDec 31, 2024 · The 4.0 head has a better flow but you really need to look at the cam and ignition and headers and fit fuel injection to get the best out of it. The 4.0 is a shorter stroke so will rev higher but the 258 is better suited to a CJ and will perform almost as well as long as these matters are taken care of.
Amazon.com: 4.0 Jeep Cylinder Head
WebJan 27, 2012 · The 4.0 head has a much higher intake port location compared to the inline ports of the 258. "Supposedly" the 4.0 head is good for 25-40 more hp. I'd say closer to the 25 level if you ran... WebThe Edelbrock #50169 Performer Cylinder Head is designed as a bolt-on performance upgrade for 1987-2006 Jeep’s with a 4.0L inline six engine. They feature better flowing intake/exhaust ports along with a modern combustion chamber design and back cut and swirl polished valves for improved flow. how to ship ez pass transponder
Jeep Cylinder Heads - 4.0 , 2.5 Cylinder Heads, Replacements
WebBrowse Jeep vehicles in Charleston, SC for sale on Cars.com, with prices under $49,972. Research, browse, save, and share from 127 Jeep models in Charleston, SC. WebThis aluminum Jeep head is an ideal upgrade for the 4.2L engines, but does require updating the intake & exhaust. Replacing the stock 4.2L head with our high performance 4.0L head … WebDetails The Edelbrock #60119 Performer RPM cylinder head is designed as a bolt-on performance upgrade for any 1967-91 AMX, Javelin or Jeep with a 343, 360, 390 or 401 AMC V8 engine. They include adjustable rocker studs and guide plates set-up for use with small-block Ford style adjustable 1.6:1 ratio rockers. how to ship equipment with lithium batteries