SPEEDFACTORY 4140 HEAD STUD KIT B SERIES VTEC LSVTEC K SERIES B16A B18C1 B18C5 K20A2 K20A3 K20Z1 K24A2

SpeedFactory Racing 4140 Head Stud Kit for Honda/Acura B & K Series (B Series VTEC engines - B16A, B18C1, B18C5, B20VTEC, LSVTEC, K20, K24)

The SpeedFactory Racing 4140 Head Stud Kit is great for most boosted applications and includes oversized forged nuts & washers for superior load distribution. A hex broach is incorporated on the top of the stud for ease of installation and a dog point end seats the stud in the block and preloads the fastener for consistent & accurate torquing.

210,000 psi tensile rating

Hex broach on the top of the stud for ease of installation

Dog point design for superior preload

Oversized forged 9/16” 12-point nuts and hardened parallel ground washers for superior load distribution compared to the smaller 1/2” nuts and washers most use

Direct drop-in replacement for OEM head bolts.

Corrosion-resistant black oxide coating

Each kit includes a complete set of 4140 head studs, nuts, washers and ARP Ultra-Torque Assembly Lubricant.

DOES NOT FIT: K24Z7, FULL B18A/B (NO VTEC HEAD)