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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8
High spring frequency to allow for better spring surge control at high rpm
reduced driveline shock
85 ft/lbs on outer four with ARP lube
No longer do you have to modify your fuel pump bucket to fit in an aftermarket pump
and so has the thickness
New OEM RA Shortblock W- Forged CP EJ255 Pistons 99.5 w- Race Bearings 99.5 Wire Harness Connectors High spring frequency to allowOutfront Motorsports Stage 1 RA shortblock is for that added Protection against ring land failure on a lightly modified car. These custom pistons are made specifically for use with the D25 cylinder heads found on the 06 14 WRX and other EJ255 applications. This configuration includes: Custom Outfront Motorsports spec EJ255 CP piston set (24cc) for D25 Heads New OEM STI black Nitrited 2017+ crankshaft New OEM STI connecting rods King Performance Rod
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