Only for N20B20 2.0L turbocharged inline-4 engine.
Not compatible with N55 or S55 engines or any hybrid/electric variants.
Oversize bore requires block re-hone if previously standard bore used.
Features
Forged 2618 aluminum for high strength under stress and temperature.
Deep valve reliefs to clear high-lift camshafts.
Oversize +2.0 mm bore option for rebuilds or increased displacement tolerance.
Balanced to ±1 gram for smoother high RPM performance.
High performance ring set (CPT-3327PVD) for improved sealing.
Includes wrist pins and locks for full assembly.
Supports up to ~1000 HP in standard configuration (with upgraded wrist pins more possible).
Compatible with oversize valves and aggressive valvetrain components.
Specifications
Bore Size: 84.50 mm +2.0 mm oversize
Stroke: 89.6 mm
Connecting Rod Length: 144.34 mm
Compression Ratio (CR): 10.0:1 (N20B20 engine)
Pin Diameter: 22 mm
Compression Height: ~32.4 mm
Piston Weight: ~351 grams per piston
Included Components
4x Forged Pistons (set of 4)
4x Wrist Pins
4x Sets of Rings (CPT-3327PVD)
4x Locking Clips / Locks
1x Spec Sheet
Product Description
The CP Pistons SC7701-4 is a forged piston set purpose-built for BMW's N20B20 2.0L turbocharged inline-4 engine. Designed for both high performance and rebuild applications, these pistons feature a +2.0 mm oversize bore option to maintain strong tolerances in worn blocks or to allow for machining room. The forging offers excellent strength for boosted or heavily modified setups, and the deep valve reliefs ensure compatibility with upgraded camshafts or oversized valves.
With a compression ratio of 10.0:1, a stroke of 89.6 mm, and connecting rod length of 144.34 mm, the SC7701-4 set balances power, reliability, and durability. Each piston weighs approximately 351 grams, and the ring set (CPT-3327PVD) ensures superior sealing. This set includes all necessary components—pins, locks, etc.—for a complete installation. Ideal for those rebuilding or modifying the N20 engine who need durable, high-quality forged pistons.
*Parts sold are for USA spec vehicles, please contact us to verify fitment on international models.
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Canada customers - If eBay does not collect import & duty fees during checkout, the shipping carrier will collect them prior to delivery.
· · · RETURNS · · ·
Your complete shopping satisfaction is our #1 priority. If an item you ordered from us does not meet your expectations, please contact us within 30 days of receiving the item(s). If your order arrives damaged from shipping please contact us and we will provide a prepaid return label to send back for a replacement or refund.
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Any returns received installed, mounted, used or missing components will be subject to return fee's.
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