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Real experience
We test before we recommend.
PRODUCT DESCRIPTION
Product details
Citroen, Peugeot 1.6L TU5J4 / TU5JP4 pistons are developed for a moderate to high level of preparation, mainly for street or club racing cars that want to develop their engine for high mileage and/or street use. Designed by ZRP engineers and manufactured in Germany from high-silicon, low-expansion 4032 (T6) alloy. This allows the engine builder to use a smaller piston-to-cylinder clearance, which results in better sealing. This minimizes knocking noise during cold start-up, common in engines using forged pistons, providing quiet operation and low oil consumption. We have chosen a lightweight X-style skirt design with a reinforcing band at the bottom, with oversized and deeper valve pockets to allow the use of high-lift camshaft profiles. They have offset pins for quiet operation and the piston pins are made from 9310 alloy. Other features include anti-detonation grooves to protect the first rings, a gas pressure accumulator groove for better ring sealing, and vibration relief. Includes a set of high-quality Japanese piston rings of 1.00mm x 1.20mm x 2.80mm.
*Note: This piston kit is compatible with the C-CIT-001L 89.00mm long stroke crankshaft.
Product Features & Design
Anti-detonation grooves for increased durability and performance.
Gas pressure accumulator groove in the second ring groove for increased lifespan.
Horizontal grooves in the pin bore designed to allow oil to enter between the pin and the pin bore.
CNC precision machined ring grooves
High-silicon, low-expansion 4032-T6 alloy
Pin bores ground
Clip cutouts on the intake side edge
Lightweight X-style skirt with lower reinforcing band for high RPM applications
Valve pockets designed to allow for larger valves and high-lift camshafts
Pistons designed to optimize compression, which extends engine life and increases power potential
Optional coatings available upon request
"Blast Off Bronze" thermal barrier coating
Molybdenum coating on the skirt side and bottom of the crown "Stealth Black"
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Each reference designed for competition.
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