(719) 661-8150
(719) 358-8903

Concept Customs

Colorado Springs
Colorado

High Performance Jeep (AMC) Inline 6

We have just released our Jeep / AMC 4.0L / 4.2L High performance engines. While we do not have official Dyno results yet, these motors on the low end builds are estimated to produce around 210 HP and 290 ft/lbs of torque, and on the high end N/A (Naturally Aspirated) builds, 260+ HP with at least 340 ft/lbs of torque. Turbo setups can easily yield an additional 20% overall. These motors are precision balanced with the performance clutch, flywheel, and harmonic balancer (included). These builds can be customized in several ways to suit your needs. Our most popular version has been a 284 Cu.In. (4.66L) Stroker. We have thoroughly inspected each core, and completely machined these motors. The cylinder heads are 100% rebuilt with new high lift valve springs, retainers and locks, then topped off with roller rocker arms. The most popular camshaft is a Comp Cams 68-235 cam kit providing for excellent torque and HP increases, as well as overall engine efficiency.

Some of the options available for these builds include different camshaft grinds, forged crankshaft and rods, different overbores and compression ratios, porting and polishing.

Electric Fan Conversions for the 2000-2004 Nissan Xterras.

This kit will include a natural finish aluminum shroud with cutout for either (1) 16" electric fan, or (2) 14" electric fans, and a lower radiator hose connection pipe with a 3/8" NPT bung for a temp switch.

Options available: (1)16" 3000 CFM electric fan, or (2) 14" 2800 CFM electric fans, brand new high capacity radiator from Performance Radiator, Manual control switch and relay kit with wiring harness.

Prices starting at around $350

Also available are:

Electric Fan Conversions for Chevrolet Truck, Blazer and Suburben.

Please contact me for current pricing and information.