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For Sale: 340, 355, 383 IMCA Modified Lightweight "CRATE KILLER 888-771-5574



5927 NE Industry Drive, DES MOINES, IA View Map


Karl Performance proudly introduces 3 new lightweight engine options for the IMCA Modified Class. Engines are available in a 340, 355, and 383 engine configurations to fit your specific needs.
These engines are 2-3 pounds lighter than the GM aluminum headed alternative and make higher horsepower and torque while being completely serviceable by the racer without the need for IMCA tags or seals. The engines have been researched and developed by Karl Performance to compete and beat the GM 604 Crate Engine. They provide excellent drivability for dry/slick tracks and are more versatile being lighter weight allowing you to better balance your race car. It features a low compression ratio for longer and more racing between freshens. Track and dyno tested, this Karl Performance engine won its first weekend on the track!
These engines feature the following components:
• 43lb forged crankshaft
• 4340 H-beam rods
• Mahle forged pistons
• Custom ground flat tappet cam
• Factory GM Vortec heads with precise custom machine work
• Scorpion roller rockers with ARP rocker studs
• Circle track oil pan
• GM factory engine block

383 IMCA Modified Lightweight Engine Assembly-530 HP/532 Torque Weighs 419 lbs.
355 IMCA Modified Lightweight Engine Assembly-515 HP/515 Torque Weighs 418 lbs.
340 IMCA Modified Lightweight Engine Assembly - 488 HP/488 Torque Weighs 418 lbs.

Price does not include a dyno or break in service. Engines are complete long blocks. Add your distributor, water pump, pulleys, ignition wires, etc. for a true drop-in ready engine package. These engines come equipped just like a 604 direct from GM


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Ad #182234155
Expires on: 11/01/2016
Posted: 10/03/2016, ad expires in 6 days
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Ad posted by:
kperformance2013 (#659128)

Karl Performance
5927 NE Industry Dr.
Des Moines, Iowa 50313

Member Since: 11/19/2012
Phone Number: 515-963-7180
Phone Number: 888-771-5574

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Toll Free: 866.326.9227 • Tel: 413.663.3496 • Fax: 413.663.3615 • Email:

Execution Stats: 0.133 sec / 8.1 MB used / 8.2 MB peak