• 4JJ1 Forged Rods - 4JJ1 H-Beam Conrods - Common Rail Cowboys
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Diesel Performance Parts

4JJ1 Forged Rods - 4JJ1 H-Beam Conrods

4JJ1 Forged Rods - 4JJ1 H-Beam Conrods

$1,553.88 AUD
$1,694.12 AUD $1,553.88 AUD
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4JJ1 Forged Rods – H-Beam Conrods

✅ 40CrMoNiA Forged | ✅ ARP2000 7/16" Bolts | ✅ Balanced ±2g

Set of 4 high-performance H-Beam conrods to suit Isuzu 4JJ1TC engines. Billet-machined from 40CrMoNiA forged steel, balanced within ±2 grams, and fitted with 7/16" ARP2000 bolts for maximum strength in high-boost builds.

⚙️ Technical Specs
  • Material: 40CrMoNiA forged steel
  • Design: H-Beam for maximum tensile strength
  • Bolts: 7/16" ARP2000 (8 included)
  • Balancing: Pre-balanced ±2 grams
  • Finish: Shot-peened & honed
📦 What’s Included
  • 4 × Forged H-Beam Conrods
  • 8 × 7/16" ARP2000 Rod Bolts
🔧 Fitment & Notes
  • Suits Isuzu 4JJ1TC engines (D-MAX, MU-X, Colorado RA7/RC)
  • Designed for ute/passenger vehicles only
  • Crankshaft must be balanced (50%) when using these rods
  • Test fit required – block machining may be necessary for clearance
🛠️ Assembly Tips
  • Check big-end/pin size compatibility with your crank and pistons
  • Use ARP Ultra-Torque lube and measure bolt stretch to spec
  • Confirm oil clearance and bearing crush with plastigauge
  • Verify rod/piston orientation and chamfer direction during install
💳 Payment & 🚚 Shipping
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Frequently Asked Questions

Will these rods fit all 4JJ1 engines?

Yes, these rods suit 4JJ1TC platforms. Always confirm clearances and test fit during assembly.

Do they come with ARP bolts?

Yes, a full set of 8 × 7/16" ARP2000 bolts is included with every kit.

Does the crank need balancing?

Yes — the crankshaft must be balanced to 50% when using these conrods to ensure reliability.

Do I need to machine the block?

In some builds, the block may need machining for clearance. Test fitting is required before final assembly.

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