Con'rod is the weak point of 4B11 engine. Upgrading of con'rod is required for performance enhancement.

HKS developed "Forged I-Beam" connecting rod, which is "Strong" and "Affordable".

POINT-1
"Strong and affordable" is the concept of the "Forged I-Beam" Con'rod

• I-Beam was selected for 4B11. It is strong and affordable with "high grade chromium molybdenum steel", "carburizing heat treatment" and "fracture splitting manufacturing for the big end".
• Although it looks like stock part, it is strong enough for high performance tuning vehicles.

• As explained above, H-Beam and I-Beam have their own merits and demerits.

POINT-2

Fracture splitting manufacturing method, which has high connection rigidity, for the big end

• Fracture splitting has higher connection rigidity than normal knock pin type as the contact surfaces are more since they are uneven.
• Although the looking is not good, since they are connected with uneven surfaces, it has great rigidity as shown in the pictures below.

POINT-3 Strength for more than 500ps

• Tested on an engine bench with GT3240 Full Turbine Kit without any problem.
• HKS Forged Piston (21003-AM003) is recommended.