Features & Benefits:-* Use with performance exhaust, air cleaner, S&S 585 bolt-in cams & EFI tune to produce massive horsepower gains. Tech Tips:-* Will Not Fit Twin Cooled Models.* Pistons measure 3.9975in. when new.* .0025in. Clearance with stock 4.00in. bore.* Pistons may be slightly more noisy than stock.* Replacement Ring Set # SS940-0040.* Follow Ring…
Features & Benefits:-* Use with performance exhaust, air cleaner, S&S 585 bolt-in cams & EFI tune to produce massive horsepower gains. Tech Tips:-* Will Not Fit Twin Cooled Models.* Pistons may be slightly more noisy than stock.* Replacement Ring Set # SS940-0041.* Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied…
Features & Benefits:-* 3.937in. Bore.* 4-3/8in. Stroke.* Pistons are compatible with stock conrods with tapered wristpin ends.* S&S bore pistons are machined to such close tolerances that it is not necessary to measure the piston. * Just bore cylinders to nominal diameter +/- 0.0005in. for correct clearance.* Additionally, the low friction coating on the piston…
Features & Benefits:-* Bore = 3.875in.* Stroke = 4.000in.* Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined.* Best resistance to cracking in hi-comp performance applications.* Require .001in. wider piston to wall clearance.* Anti-Friction skirt coating.* Complete kit includes: two pistons, rings, wrist pins and clips.Tech…
Features & Benefits:-* Bore=3.875in. * Stroke=4.000in.* Hypereutectic Alloy is a cast 16% silicon content material* Perfect for air cooled engines* Low thermal expansion rate = tighter piston-to-cylinder clearance* Complete kit includes: two pistons, rings, wrist pins and clips.Tech Tips:-* 10.5:1 Compression Ratio with 85cc Head Chamber Volume.* Follow Ring End Gap & Piston to Cylinder…
Features & Benefits:-* Bore = 3.875in.* Stroke = 4.000in.* Hypereutectic Alloy is a cast 16% silicon content material.* Perfect for air cooled engines.* Low thermal expansion rate = tighter piston-to-cylinder clearance* Complete kit includes: two pistons, rings, wrist pins and clips.Tech Tips:-* 9.3:1 Compression Ratio with 85cc Head Chamber Volume.* Follow Ring End Gap &…
Features & Benefits:-* Bore = 3.885in.* Stroke = 4.000in.* Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined.* Best resistance to cracking in hi-comp performance applications.* Require .001in. wider piston to wall clearance.* Anti-Friction skirt coating.* Complete kit includes: two pistons, rings, wrist pins and clips.Tech…
Features & Benefits:-* Bore = 3.885in.* Stroke = 4.000in.* Hypereutectic Alloy is a cast 16% silicon content material* Perfect for air cooled engines.* Low thermal expansion rate = tighter piston-to-cylinder clearance.* Complete kit includes: two pistons, rings, wrist pins and clips.Tech Tips:-* 10.5:1 Compression Ratio with 85cc Head Chamber Volume.* Follow Ring End Gap &…
* These forged 3-7/8in. bore stroker pistons for 1999-2006 Twin Cam are required for the S&S 106in. stock bore stroker kit with 4-1/2in. stroke flywheels. * Flat Top Pistons. 3.875in. Bore & 4-1/2in. Stroke* 10.1:1 Compression Ratio with Stock 85cc Heads.* 9.8:1 Compression Ratio with S&S 89cc Heads # SS106-3240.* They are compatible with stock…
Features & Benefits:-* Bore = 4.000in.* Stroke = 4.375in.* Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined* Best resistance to cracking in hi-comp performance applications* Require .001in. wider piston to wall clearance* Anti-Friction skirt coating.* Complete kit includes: two pistons, rings, wrist pins and clips.Tech…
Features & Benefits:-* Bore = 4.000in.* Stroke = 4.375in.* Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined* Best resistance to cracking in hi-comp performance applications* Require .001in. wider piston to wall clearance* Anti-Friction skirt coating.* Complete kit includes: two pistons, rings, wrist pins and clips.*…
Features & Benefits:-* Bore = 4.010in.* Stroke = 4.375in.* Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined* Best resistance to cracking in hi-comp performance applications* Require .001in. wider piston to wall clearance* Anti-Friction skirt coating.* Complete kit includes: two pistons, rings, wrist pins and clips.Tech…
