Caterpillar 3406E, C15, C15 Acert Injectors in stock now!

What's your Engine?

At HHP, we are not just selling you diesel engine parts, we are selling you an industry leading service because it is our mission to take the risk out of buying diesel engine parts.

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Heavy-Duty Diesel Engine Parts Categories

We source our heavy-duty diesel parts from a variety of manufacturers across the country, giving us more opportunity to get you the exact engine part you need, as fast as possible. We have the ability to determine availability, price, and quality for you within minutes. With premium diesel engine parts from manufacturers like Cummins, Caterpillar, Volvo diesel, Detroit Diesel, and several more, HHP is your one-stop shop for big rig repairs.


Welcome to Highway and Heavy Parts, LLC. (HHP)

We offer quick, simple, and easy access to thousands of diesel engine parts dropped right at your door including engine rebuild kits, turbochargers, cylinder heads, camshafts, and fuel injectors. Our product lines cover on-highway, off-highway, power generation, and natural gas markets. No matter what business you are in, we are confident we can meet your needs. Contact HHP today at 844-215-3406!

gold stars Real Reviews From Real Customers — 487 Reviews


Exceptional service

review gold stars

Needed one piston for my 98.5 Cummins and you folks came through shining. I was thrilled when my piston arrived and I learned it w...


Right Part, Right Price

5 star review image

Excellent Selection and Pricing
Stuart M.



gold 5 star review

Alejandro P.


Super Great updates all the

review gold stars 5

Super Great updates all the way from start to finish!
Gregory E.


water pump

5 star review gold stars

Right part! Right Price! Fast shipping!
Rick G.


Very good part, es muy

review gold stars

Very good part, es muy buena tiene alta calidad
Pedro R.


Quantity control valve

5 star review stars

So far great and excellent
derek s.


Easy ordering, helpful staff

5 star review

Easy ordering, helpful staff and quick delivery.
Jon H.

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Enter the HHP Calendar Contest!

We decided to bring the HHP calendar back once again for 2024! Now we need your help to fill the pages! Send a picture of your diesel vehicle for a chance to be featured on one of twelve full-color pages in our 2024 HHP calendar. Entering is easy, and everyone who enters will receive TWO FREE COPIES of the 2024 calendar.

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