Srp Forged High-Compression Dome Piston For Big Block Chevy – Part #139831, Optimized For Performance Builds

Description

Big Block Chevy – High Compression Dome Forged Piston

489 c.i., 4.280″ bore, 4.250″ stroke, 6.385″ rod length, 43.0cc dome volume

SRP139831

P139831

This piston set is ideal for oval track to street/strip applications, it is forged from high silicon 4032 aluminium alloy. Features include CNC machined ring grooves and forced pin oiling. Piston set accepts 1/16, 1/16, 3/16 rings.Includes:Spiro Lock: 990-042-CSStraight Wall Pin: 990-2930-150(150g)Specifications:Part #: SRP139831CID: 489Bore: 4.280Stroke: 4.250Rod Length: 6.385Compression Height: 1.270Compression Ratio with 112cc chamber volume: 13.8Compression Ratio with 118cc chamber volume: 12.7Compression Ratio with 124cc chamber volume: 11.8Dome Volume: 43ccGram Weight: 574Oversize: 0.030Recommended Ring Set (Check Proseal listing todetermine oil ring tension): J100F8-4280-5SRP Pistons was founded in 1997 by JE Pistons, the world’s largest manufacturer of forged racing pistons. The idea was simple, to create a high quality forged piston at an affordable price. Every SRP forging was created with quality, performance and affordability in mind. By designing dedicated forgings, the pistons became both lighter and stronger while machining time and scrap aluminium were drastically reduced. These factors have reduced the price of SRP Pistons and contributed to their success. Today, over 400 different piston part numbers comprise the SRP product line-up, including Chevy, Ford, Chrysler, Honda and more.

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