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

Office: Mansfield, Texas       Shop/Dyno: Ft. Worth, Texas

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

09/05/18 California law now requires any reseller of California based manufactured parts (including by not limited to Dart, Race Winning Brands, AFR, Scat and Brodix) to inform it's customers of the following

(in accordance with Proposition 65):