ARP 203-6003 HP Series Rod Bolt Kit Toyota 2TC 3TC 2TG 1.6L/1.8L Corolla Celica

Vehicle Fitment

• 1971-1982 Toyota Corolla (2TC 1.6L SOHC I4, RWD)
• 1980-1982 Toyota Corolla (3TC 1.8L SOHC I4, RWD)
• 1971-1985 Toyota Celica A20/A40/A60 (2TC 1.6L SOHC / 2TG 1.6L DOHC / 3TC 1.8L SOHC, RWD)
• 1972-1979 Toyota Corolla Sprinter Trueno / Levin TE27 / TE28 (2TG 1.6L DOHC I4, RWD)
• 1974-1985 Toyota Celica GT / GTS / ST / LT (2TC / 2TG / 3TC, RWD)
• 1979-1985 Toyota Celica Supra (2TC / 3TC, RWD)
• Toyota Carina and related T-series platforms equipped with 2TC, 3TC, or 2TG engines

Fitment Notes

• Designed for stock OEM connecting rods using the T-series rod bolt specification - confirm your rods match before ordering
• Covers the 2TC (1.6L SOHC), 3TC (1.8L SOHC), and 2TG (1.6L DOHC twin-cam) engines sharing the same rod bolt pattern
• ARP recommends using a stretch gauge for installation - stretch spec is 0.0050-0.0055 in.; torque spec is 40 ft-lbs with ARP Ultra-Torque lubricant
• Adequate chamfer at the top of the rod bolt hole is required to clear the underhead radius

Features

• Made from seamless and defect-free 8740 chromoly steel, rated at 200,000 psi tensile strength - nearly five times stronger than OEM connecting rod bolts
• Threads rolled after heat treatment for superior fatigue strength compared to bolts threaded before heat treating
• Large underhead radius reduces stress concentration at the critical bolt head-to-shank junction
• Heat-treated before grinding and thread rolling for consistent material hardness throughout
• Guaranteed to pass magnetic inspection testing - meets the quality standard for competition engine applications
• Reusable within spec - check bolt stretch at each teardown and replace if permanently elongated beyond service limit

Specifications

• Part Number: 203-6003
• Material: 8740 Chromoly Steel
• Tensile Strength: 200,000 psi
• Cap Retention Style: Through-Bolt (with nut)
• Head Style: A
• Nut Style: Hex
• Rod Manufacturer: Stock OEM Rods
• Stretch Spec: 0.0050-0.0055 in.
• Torque Spec: 40 ft-lbs with ARP Ultra-Torque lubricant
• Finish: Black Oxide
• Nuts Included: Yes
• Quantity: Set of 8 (covers one complete engine)

Included Components

• 8x ARP 8740 Chromoly Connecting Rod Bolts
• 8x Hex Nuts
• 1x ARP Ultra-Torque Fastener Assembly Lubricant

Product Description

The ARP 203-6003 is a High Performance Series connecting rod bolt kit for Toyota's T-series engines - the 2TC (1.6L SOHC), 3TC (1.8L SOHC), and 2TG (1.6L DOHC twin-cam) - found in the classic Corolla, Celica, Sprinter Trueno/Levin, and Carina from the early 1970s through the mid-1980s. These vintage Toyota engines have a dedicated following in historic motorsport, circle track, and classic Japanese car builds. Upgrading the OEM rod bolts is a fundamental step in any engine rebuild, as the original hardware is not designed for sustained high-RPM operation or the cyclic fatigue loads of performance use.

Made from 8740 chromoly steel rated at 200,000 psi, these ARP bolts are nearly five times stronger than OEM hardware with threads rolled after heat treatment for exceptional fatigue life. The recommended installation method is stretch gauge measurement to 0.0050-0.0055 in. for accurate preload. Sold as a complete set of 8 bolts and nuts for one engine.