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The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance Trimetal engine bearings. Designed to withstand higher RPM conditions, ACL Race Series Engine Bearings are available for many of the popular 4, 6 & 8 cylinder applications.
Part # Description # Sizes Buy Now Status
BC4020 BEARINGS - ACL Race Series HX - Rods, Mains, Thrust (Honda B18A/B18B, K20/K24 Custom Stroker) Standard In-Stock

Head Studs
ARP uses premium grade 8740 alloy that is heat treated to 200,000 p.s.i. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best. Following heat treat, each stud is centerless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. ARP studs are thread rolled after heat treat which gives them about 1000% better fatigue strength than studs that are threaded prior to heat treat (a very common industry practice). It costs more to do it this way because its tough on tooling but the results are well worth the extra effort.

Main Studs
ARP main studs eliminate main cap walk and fretting as well as protecting the threads in your engine block. All kits come complete with hardened parallel-ground washers and high quality nuts. Manufactured from 8740 chromoly steel, heat-treated in house to 200,000 p.s.i. tensile strength and precision J-form threads rolled after heat treat to create a fastener that has threads 1000% stronger than OEM produced studs. A must for high horsepower, high rpm engine applications.

Part # Description # ARP P/N Buy Now Status
AR8602 HEAD STUD KIT - ARP (Acura B18A/B) 208-4302 In-Stock
AR8702 MAIN STUD KIT - ARP (Acura B18A/B) 208-5404 In-Stock
The Darton MID™ Sleeve Kit is available for many series of 4, 6, and 8 cylinder import and domestic engines and provides for maximum bore sizes and boost potential. The benefits of our MIDseries kits are:
  • Cast iron performance in an aluminum block
  • Improved block integral strength
  • Improved cooling
  • Kits can be installed by your local machine shop
  • "Wet sleeve" replace-ability
  • Full installation manual available on website
  • Increased horsepower output potential
  • High boost and horsepower potential
  • Superior oil and compression control
  • Superior cylinder sealing and ring wear
  • Street or strip application
  • Bulletproof Darton ductile iron,
  • 130,000-psi tensile strength
  • Part # Description # Darton P/N Bore Size Semi Bore O.D. Wall Thk Length Flange Thk Flange Dia Buy Now Status
    BC8001 BLOCK SLEEVES - Darton M.I.D. (Honda B18 New Phosphate Coating) 400-140P 84mm-85mm 3.298" 3.750" 0.285" 5.500" 0.500" 4.626" In-Stock
    BC8003 BLOCK SLEEVES - Darton M.I.D. (Honda B18 Drag Kit) 400-180 86mm-87mm 3.375" 3.750" 0.188" 5.500" 0.500" 4.626" In-Stock
    BC8001-1 BLOCK SLEEVES - Darton M.I.D. (Honda B18 New Phosphate Coating) 400-130P 81mm-85mm 3.180" 3.750" 0.285" 5.500" 0.500" 4.626" In-Stock
    Cometic gaskets combine advanced materials with state-of-the-art manufacturing processes to provide custom-tailored solutions to meet the needs of each individual application. The MLS head gasket is comprised of a three layer setup - Viton coated embossed spring steel outer layers surround a steel inner layer that provides support and thickness to the gasket. Embossments on the gasket allow for a proper seal around oil and water passages.
    Part # Description # Bore Thickness Buy Now Status
    BC8298 Gaskets - Custom Cometic allow 3 weeks for delivery specify specify In-Stock