Mazworx RB26DETT Long Block Stage 2.5

The Mazworx RB26DETT Long Block Stage 2.5 is engineered for high-performance applications targeting power outputs between 800 and 1000 horsepower. This comprehensive engine package combines a heavily upgraded Stage 2.5 short block with a Stage 3 CNC-ported cylinder head, premium valvetrain components, and proven oiling, timing, and engine hardware for a durable and performance-focused RB26DETT build.

Stage 2.5 Short Block

Labor

• Complete disassembly and thorough cleaning of the short block.
• Hot tank cleaning and preparation of all major components.
• Sandblasting and painting of the iron block.
• Machining for threaded oil port plugs.
• Machining for threaded freeze plugs.
• Precision block resurfacing.
• Cylinder resizing using a torque plate for accurate bore geometry.
• Line bore honing for proper crankshaft alignment and bearing clearances.
• Installation of an oil pump collar on the crankshaft when required.
• Cleaning, inspection, polishing, and balancing of the crankshaft.
• Complete short block assembly.

Key Parts Supplied

• Custom HD CP pistons, 86.5mm with a 9:1 compression ratio.
• Upgraded 9310 wrist pins with a .250″ wall thickness and 22mm diameter.
• BC ProH625+ connecting rods with 22mm wrist pins.
• ACL race bearings.
• ARP main studs.
• Mazworx threaded and O-ringed small plugs.
• Mazworx threaded and O-ringed freeze plug kit.

Stage 3 Cylinder Head

Labor

• Complete cylinder head disassembly.
• Sandblasting and preparation of the cylinder head.
• Removal, drilling, tapping, and replacement of oil port plugs.
• Stage 3 CNC porting and combustion chamber machining.
• Camshaft clearancing.
• Machining for threaded freeze plugs.
• Removal, reinstallation, and reaming of valve guides.
• Race-grade valve job.
• Precision valve lash adjustment.
• Cylinder head resurfacing.
• Complete cylinder head assembly.

Key Parts Supplied

• Kelford 184-SE camshafts with 288°/292° duration and 11.1mm lift.
• Kelford DLC-coated cam followers.
• Supertech +1mm intake valves.
• Supertech +1mm Inconel exhaust valves.
• Supertech bronze valve guides.
• Kelford RB26DETT beehive valve spring and titanium retainer kit with 105 lb spring pressure.
• Supertech valve seals.
• Mazworx threaded freeze plugs.
• Additional plugs as required.

Complete Long Block Assembly

• ATI Super Damper for improved crankshaft stability.
• ARP crank bolt.
• HKS upgraded oil pump.
• Tomei oil pan baffle.
• LeaskSpec oil pan extension.
• HKS Fine Tune timing belt.
• Apexi 88mm x 1.5mm head gasket.
• Kelford adjustable cam gears.
• OEM water pump.
• ARP CA625+ head studs.
• OEM timing belt pulleys.
• HKS 36-2 trigger kit.
• Powder coated valve cover and timing cover.
• Mazworx bolt kit.
• Break-in oil and filter included.
• Engine is spun and primed prior to delivery.

Requirement: A complete RB26DETT long block core is required for this build.