Through-hardening steel used for conrods, crankshafts and stub axles.

4340 Alloy Steel

5 aftermarket parts. 4 of the aftermarket entries carry this material because the seller printed it; none was inferred from what the part usually is.

• CP-Carrillo🇺🇸

  Pro-H Connecting Rods, 3/8 in Bolt, 911 Turbo (997.2)

  Forged steel rods with 3/8 in bolts — the usual answer to the one part of this bottom end that is not as strong as the rest.

  US$2,000.00Recorded 2026-08-18

  Engine Internals9974340 Alloy Steel
• PMB Performance↗🇺🇸

  108 MM CV Joint Conversion Kit for Porsche 914 and 914-6

  Part listed for the 914.

  US$728.00Recorded 2026-08-19

  Drivetrain9144340 Alloy Steel
• PMB Performance↗🇺🇸

  Replacement Spiral Locks for 930 Axles, 4 pieces.

  VW listed for the 901, g-series, 964, 993, 996, 997, 991, 992.

  US$5.00Recorded 2026-08-19

  Drivetrain901g-series9649939969979919924340 Alloy Steel
• PMB Performance↗🇺🇸

  28 Spline Free Floating Axles for 108mm CV Conversions for Porsche 914 (1970-76)

  Part listed for the 914.

  US$230.00Recorded 2026-08-19

  Drivetrain9144340 Alloy Steel
• Pauter Machine🇺🇸

  Pauter 4340 Connecting-Rod Set, 911 (997.1)

  Set of six custom Pauter connecting rods sold by Slakker Racing Development with separate naturally aspirated and Turbo/GT3 engine selections.

  US$1,920.00Recorded 2026-08-25

  Engine Internals9974340 Alloy Steel