ZRP RODS – PISTONS SET BMW 3.0L M54B30 E46

The Citroen and Peugeot 1.6L TU5J4/TU5JP4 pistons are designed for moderate to high-performance tuning, primarily for road racing or club racing cars looking to develop their engines for high mileage and/or road use. Designed by ZRP engineers and manufactured in Germany from a high-silicon, low-expansion 4032 (T6) alloy. This allows the engine builder to use a tighter piston-bore clearance, resulting in better sealing. This minimizes the slapping noise during cold starts, common with engines using forged pistons, ensuring quiet operation and low oil consumption. We chose a lightweight X-Style skirt design with a lower reinforcing band, with oversized and deeper valve pockets to allow the use of high-lift camshaft profiles. They feature offset pins for quiet operation, and the wrist pins are made of 9310 alloy. Other features include anti-knock grooves to protect the first rings, and a gas pressure accumulator groove for improved ring retention and vibration reduction. A premium Japanese-quality 1.00mm x 1.20mm x 2.80mm ring is included.
Product Features & DesignAnti-knock grooves for long life and high performanceGas pressure accumulator groove in the second ring for increased wear resistance.Horizontal slots in the pin hole designed to allow oil to penetrate between the pin and the pin hole area.Precision CNC machined ring groovesHigh-silicon/low-expansion 4032-T6 alloyHoned pin holesClip-on cutouts on the intake side edgeLightweight X-Style skirt with lower reinforcing band for high-rpm applicationsValve pockets designed to accommodate oversized valves and camshafts High-lift PistonsPistons designed to optimize squish for longer engine life and increased power potentialOptional coatings offered upon requestBlast Off Bronze Thermal Barrier CoatingStealth Black Side-Skirt and Under-Crown Moly CoatingAdditional InformationApplication 1.6L TU5JP4 / 1.6L TU5J4Bore Size 78.70mmWeight 253gStroke 82.00mmCompensation Ratio 12.98:1OEM Compensation Ratio 10.8:1Compensation Height 24.70mmRod 141.00mmPin Diameter 18.00mmDeck Clearance -0.30CCS Dome +11.20CCRing Set 787XDS-3Wrist Pin Pn WP031