Shop Heavy-Duty Diesel Engine Parts
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111503 | New, .50mm Piston for Cummins ISB
$112.35HHP#: P267819View product -

1121579 | Caterpillar Seal – O-Ring
$8.97HHP#: P000867View product -
1121580 | Caterpillar Seal – O-Ring
$6.72HHP#: P000868View product -
112302 | Cummins Snap Ring
$0.33HHP#: P017786View product -
1123258 | Caterpillar Seal – O-Ring
$4.57HHP#: P000870View product -
1123259 | Caterpillar Seal – O-Ring
$4.19HHP#: P000871View product -
112408 | Cummins Washer
$0.43HHP#: P017787View product -
112847 | Cummins O-Ring
$2.64HHP#: P017792View product -
1129965 | Caterpillar Double Lip Seal
$27.64HHP#: P203691View product -
113-1141 | Caterpillar Pump, Oil 3044
$205.98HHP#: P267614View product -
113244 | Cummins Gear
$28.13HHP#: P017793View product -
1135304 | Oil Lines Group Seal for Caterpillar C15, 3406E, 3406B, New
$16.50CPL/ESN Prefix: 1LW, 1MM, 2WS, 4MG, 5EK, 6NZ, 6TS, 7FB, 8PN, 9NZ
HHP#: P000903View product
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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!

















