KB Pistons (Made in the USA)

Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined. The combination of this

alloy and forging process allows the piston to flex under detonation or pre-ignition, giving the best resistance to cracking.

Since 4032 alloy has a low expansion rate but higher than Hypereutectic, it will require about a .001 wider piston to wall

clearance. Forged pistons are suited for Street or Race with power adders such as NOS or boost. Models that end in a C

come with Anti-Friction skirt coating

 

Twin Cam 96" to 103"

Fits 2007 up  

Forged Pistons Coated

(KB 909C)

10.5:1 with Hastings Rings

Size Std +005  +010
TEC # 33030 33031 33032
 

Twin Cam 96" to 103"

Fits 2007 up  

Forged Pistons Coated

(KB 908C)

10:1 with Hastings Rings

Size Std +005  +010
TEC # 33025 33026 33027
 

Twin Cam 96" to 103"

Fits 2007 up  

Forged Pistons Coated

(KB 907C)

9.5:1 with Hastings Rings

Size Std +005  +010
TEC # 33020 33021 33022
 

Twin Cam 88" to 95"

Fits '99-06  

Forged Pistons Coated

(KB 906C)

10.5:1 with Hastings Rings

Size Std +005  +010
TEC # 33040 33041 33042
 

Twin Cam 88" to 95"

Fits '99-06  

Forged Pistons Coated

(KB 905C)

10:1 with Hastings Rings

Size Std +005  +010
TEC # 33045 33046 33047
 

Twin Cam 88" to 95"

Fits '99-06  

Forged Pistons Coated

(KB 904C)

9.25:1 with Hastings Rings

Size Std +005  +010
TEC # 33050 33051 N/A