Description
MRP 4a (aka 5age) Stroker Kit 1800cc
This is not your generic stroker kit with bad rod/stroke ratios or some random crankshaft with no thought put into the design. Huge amount of thought & Engineering went into the design of this kit
We are not a generic rod/crank supplier, we specialise in 4age performance and focus solely on making the best parts for your 4age
Our kits are being used all around the world with power figures past 900hp on 45psi of boost! or in N/A form 250hp+ and 10,000rpm
This kit has been on the market for 16 years and used in all types of racing with great success, many revisions have have been made to the design over time to provide better reliability and performance so you can be assured what your getting has been properly engineered and race tested to extreme conditions.
The pistons in this kit are a special custom design where we worked with Traum USA to get what we needed
Rod/stroke ratio is 1.52:1
Custom MRP 83mm Billet 4340 Crank Fully Counter Weighted
Large counter weights to dampen harmonics at high RPM which is essential to stroker crank designs for reliability
Extra large section through rod journal to counter weight for increased strength and reduced flex in one of the most critical areas of load
8 Bolt to take 4age flywheels
OEM 4age journal sizes so you can use the OEM 4age size bearings
Cross Drilled Oil gallery holes for improved oil flow to the rod bearings
Nitrided, Fully balanced
**Optional 4330VM material for those wanting 10,000rpm+ for circuit racing use**
Custom MRP Billet 4340 conrods
Around 3% longer than the 4a rods
H-beam (500g with bolts)
Rods are notched on the journals which acts as an oil squirter up into the bottom of the piston
ARP2000 Rod Bolts as standard
Nitrided & Fully balanced
700hp rated or 9500rpm (Those seeking 10k rpm + reliably circuit racing should go for the CP Carillo conrods)
**Optional CP Carillo Conrods available for those seeking super high end rods
**Optional Billet Aluminium Conrods available for drag engines only running on boost over 40psi**
Custom MRP Forged Pistons by Traum
Low compression height, 20v & 16v available in both N/A & Turbo to any compression you require.
Rings & gudgens supplied
Special short skirt design to reduce friction which helps power wise & reliability
Optional Ceramic coating on the domes to reduce heat to the pistons and keep the heat in the chamberÂ
Optional Telfon coated skirts to reduce friction and also provides a dry film lubricationÂ
Notes
To be used with the 4age block
Modifying of the block is required for clearance of the crank to spin freely
Fits 4age flywheels
Crank ladders, Ross race Harmonic pulley and cams gears are optional extra.
Other parts available on request:
Toyota OEM rebuild gasket kits
ARP Head & Main Studs
Twinplate clutch kits
Supertech Valve train parts
Head Porting Service
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