632 Medium Duty NOS


632 Medium Duty N2o

Another performance kit/build by Ray @ Raymac Racing Engines


For those of you that keep asking us about putting nitrous in your pump gas 632. This is for you!

• World Merlin IV 4.600 x 10.2 Deck
• Dart 4.750 Center Counterweighted, 4340, Blower Keyed Crankshaft, Internally Balanced
• Manley 6.700 “H” Beam, ARP 2000 Bolts
• JE 4.600 Bore 40cc Dome 15.1:1 Compression with Upgraded .200 Wall 93s Pins
• JE Pro Seal Steel Nitrited Ring Set 1/16, 1/10, 3/16
• King Alecular Main Bearings, Clevite H Rod Bearings, Extra Clearance
• Dart 345 Pro1 Head Assembly
• ARP Head Studs
• Cometic MLS Head Gaskets 4.600 x .042

Block & Rotating Assembly: $5043
Head Assembly: $2950
Total: $7,993

Option it out for HEAVY N2O Duty…. handling another 400-500hp
• Dart Sportsman Block +$150
• Dart Big M Billet Caps +$475
• Manley Forged Induction Rods +$800
• GRP Power Adder Aluminum Rods +$775
• Callies Magnum Crankshaft +1,100
• Cam Kits
• Oil Systems
• Head Upgrades


Contact Raymac Racing Engines

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Call us for a free quote!

817.705.5424   or  940.594.0350

All products are subject to availability. Customizing a part may delay shipping. All prices are subject to change.

09/05/18 For our Scat customers..... California law now requires any reseller of Scat products to inform it's customers of the following (in accordance with Proposition 65): WARNING: May Cause Cancer and Reproductive Harm - www.P65Warnings.ca.gov. The notice also states that SCAT will be placing warning labels on those products effected (affixed to products, labels or packaging).