Shop Heavy-Duty Diesel Engine Parts
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8M8997 | Caterpillar Seal – O-Ring
$0.47HHP#: P007521View product -

8N1414 | Check Valve for Caterpillar 3306, New
$45.61HHP#: P013955View product -
8N1608 | Caterpillar 3406/B/C Piston Pin, New
$40.52CPL/ESN Prefix: 4MG, 7FB
HHP#: P013960View product -
8N1608 | Caterpillar 3412 Cylinder Kit
$592.46HHP#: P257657View product -
8N1721 | Caterpillar 3304/3306 Connecting Rod, New
$139.74HHP#: P013966View product -
8N1726 | Piston Connecting Rod for Caterpillar 3406B, Remanufactured
$173.61CPL/ESN Prefix: 4MG
HHP#: P201431RView product -
8N2301 | Caterpillar Seal
$7.17HHP#: P013976View product -
8N2641 | Caterpillar Fuel Transfer Pump Sleeve, New
$45.43HHP#: P254352View product -
8N3088 | Caterpillar Shaft Assembly, New
$189.74HHP#: P013992View product -
8N3176 | Caterpillar Service Group
$38.52HHP#: P012639View product -
8N3311 | Caterpillar Shaft
$42.69HHP#: P013999View product -
8N3323 | Turbocharger for Caterpillar D399, New
$2,938.00HHP#: P010879View product
Showing 6277–6288 of 33082 results
If you are unable to find what you are looking for, please call us as we have hundreds of thousands of products available and we cannot show them all on the website.
Aftermarket Parts for Cummins, Caterpillar, Detroit Diesel and Many More
At Highway & Heavy Parts, we specialize in providing top-quality parts for big trucks and agricultural equipment, featuring industry-leading brands like Cummins, Caterpillar, and Detroit Diesel. Whether you’re looking for complete engine rebuild kits, fuel injectors, turbochargers, or gaskets, we have everything you need to keep your diesel engine running at peak performance.
Premium Diesel Engine Parts for Big Trucks & Agriculture
We know that downtime is costly. That’s why we offer high-quality, OEM-spec aftermarket parts designed to meet or exceed manufacturer standards. Our extensive inventory ensures you get the right part quickly, helping you stay on the road or in the field with confidence. A few of the major diesel manufacturers which we produce and distribute replacement parts for are Cummins, Caterpillar, and Detroit Diesel. Check out some of the aftermarket diesel parts we carry for these big trucks and agricultural equipment.
Cummins Diesel Engine Parts
From the reliable Cummins ISX to the hardworking 5.9L and 6.7L engines, we provide:
- Engine rebuild kits
- Fuel injectors & pumps
- Turbochargers
- Cylinder heads & gaskets
Caterpillar Diesel Engine Parts
Caterpillar engines power some of the toughest machines on the road and in agriculture. We stock parts for C15, 3406, 3126, and other popular CAT engines, including:
- Overhaul kits
- Turbochargers
- Cylinder heads
- Oil pumps & more
Detroit Diesel Engine Parts
Detroit Diesel engines are built for power and durability. Whether you have a Series 60, DD13, DD15, or DD16, we have the parts to keep it running strong:
- Engine rebuild kits
- Fuel injectors
- Camshafts & lifters
- Turbochargers
Why Choose Highway & Heavy Parts?
Quality You Can Trust – We source premium aftermarket and OEM-spec parts.
Fast & Reliable Shipping – Get your parts when you need them.
Expert Support – Our ASE-certified diesel technicians are here to help you find the right part.
Competitive Pricing – Get high-performance parts without breaking the bank.
Get back on the road or in the field with confidence! Browse our selection of Cummins, Caterpillar, and Detroit Diesel engine parts today. If you have any questions, contact our expert team for personalized support!












