Ready to Run 604 Modified GM Crate Engine Package


Now offering free freight and a $50 Visa gift card with purchase

Karl Performance KPM 604M-R2R

IMCA Sealed

Karl Performance has expanded our popular dyno'ed 604 Crate Engine package by now offering a fully dressed out and dyn'ed 604 that comes complete with MSD Billet distributor; PRC race ignition wires; aluminum racing water pump; and billet aluminum pulleys. Add your carb and fuel system to this engine for a true; drop in engine assembly. If you would like your engine dyno'ed and tuned in to match your carb perfectly; you can chose to send us your carb and we will dyno it with your new engine. 

604M-R2R Includes the following:

  • Dyno service-timing set; valves lash set; check for oil leaks; verfiy correct compression and power output; lock out distributor.
  • Fuel & break in oil 
  • Billet aluminum pulleys
  • Race series hi pressure/flow aluminum water pump
  • MSD Billet Distributor 
  • PRC Race Series ignition wires with protective heat sleeve


An engine’s oil system and fuel delivery are critical to maximize performance and longevity. That’s why the Karl Performance professional machinists have developed these recommended accessory items. Through extensive R&D in the machine shop and on the track; these items have proven to give you the best of both worlds.



  • PRC 4022LGC604/4023HDLMC604 Karl Performance Race Carbs
  • PRC 4711 Fuel Log
  • PRC CS1416 Fuel Pump 14-16psi (Recommended for gas only)
  • GM 19300952 GM Spring Upgrade Kit
  • FEL 1900 Fel-Pro 4 Barrel Carb Gaskets
  • BRI 73056 Transmission Coupler
  • SCA-FP350L-153-SFI Balanced Flexplate
  • MSD 6425 Digital Ignition Box

Free Shipping is only available to a business address with a dock or forklift. Additonal charges may apply for residentail delivery.

Karl Performance Dynoed 604 Ready To Run Crate Engine-Free Freight

Brand: Karl Performance Motors

Retail Price: $7,101.10
You save $0.00

Special Price: $7,101.10

Part Number: 604-R2R

Free Shipping Qualifications(engine, transmissions, etc. only):

Free shipping on all engines and transmissions in the lower 48 states is FREE. Applies to commercially zoned addresses. Please call or contact us for more information.

  • $110.00 surcharge for delivery to a commercial location where a liftgate is required.
  • $220.00 surcharge for delivery to a residential address.

Some items are too large for our normal fast delivery service and will be delivered "to your door" via truck freight service. "Free Shipping on GM Engines or Transmissions" applies to engines shipped in the Continental 48 States to a business address in a commercial location.

Related Products

GM 19318604IMCA
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