Piston Ring Set 4.020 Classic 2.0 1.5 4.0mm

The Piston Ring Set 4.020 Classic 2.0 1.5 4.0mm from Total Seal represents a premium choice for engine builders and performance mechanics undertaking serious cylinder work. Designed for classic and street applications where bore diameter reaches 4.020 inches, this ring set addresses the critical sealing demands that separate a tight, efficient engine from one prone to blowby and oil consumption. Whether you're rebuilding a vintage V8, restoring a muscle car original, or building a modern classic-style small-block, proper piston ring selection directly impacts compression, oil control, and long-term engine reliability.

This Total Seal ring set employs a precisely engineered three-ring package: a 2.0mm top compression ring, 1.5mm second compression ring, and 4.0mm oil control ring configuration. The graduated ring widths optimize gas sealing on the compression strokes while maximizing oil scraping efficiency during the power stroke and exhaust phases. Total Seal's manufacturing expertise ensures consistent bore contact and minimal wear on cylinder walls—critical when you've invested in a precision honing job to achieve proper ring-to-wall clearance. The 4.020-inch bore sizing accommodates stock and +.020-inch overbore blocks, making this set versatile for both original restorations and performance rebuilds where modest displacement gains are desired.

Mechanics and engine builders working on small-block and mid-sized classic engines benefit most from this ring set's proven durability and proven sealing geometry. Installation requires careful attention to ring end-gap measurement and proper positioning of ring gaps around the piston to prevent rotation and ring-to-ring contact. The compact dimensions and light weight (0.94 lbs) make this set straightforward to handle during piston assembly. Compatible with both cast and forged pistons, this Total Seal ring set delivers the compression and oil control necessary for engines that will see street duty, weekend cruising, or light performance use—anywhere precise ring seal prevents blow-by and keeps your engine running clean.