Mack engines have long meant durability and strength just look at their bulldog mascot. They were founded in 1900, originally as the Mack Brothers Company. They are now owned by Volvo, but through their long history they’ve produced engines that remain popular with many operators.
Continue reading Mack Engine Serial NumbersCategory: Mack Engine Parts & Heavy-Duty Components
Volvo D13 / Mack MP8 Turbo Overspeed Failure: What Causes It And Why Replacing The Turbo Isn’t Enough
Turbocharger failure on a Volvo D13 or Mack MP8 engine isn’t always caused by wear – it’s often the result of turbo overspeed conditions driven by VGT control issues, exhaust imbalance, or air system faults.
In many cases, the turbo fails because it was forced to operate outside of its design limits – not because the turbo itself was defective.
Understanding what causes turbo overspeed is critical to preventing repeat failures.
Continue reading Volvo D13 / Mack MP8 Turbo Overspeed Failure: What Causes It And Why Replacing The Turbo Isn’t EnoughCummins ISX Inframe Rebuild Failure: Why Your New Liners Aren’t Sealing (And How to Fix It)
You finished the inframe. New liners, pistons, rings – everything looks right.
But now you’re seeing:
- Blow-By
- Oil Consumption
- Low Compression
- Or Worse… It’s Smoking Under Load
This isn’t uncommon on Cummins ISX engines – and it usually comes down to one issue:
Improper liner protrusion and ring seating during install.
If you don’t get this right, your rebuild won’t last – no matter how good your parts are.
Continue reading Cummins ISX Inframe Rebuild Failure: Why Your New Liners Aren’t Sealing (And How to Fix It)Dinex Emission: The Solution to Diesel Pollution
Dinex Emission is a company that has been dedicated to helping diesel operators meet the high standards of the EPA for a very long time. Though the EPA’s goal is to reduce the emissions of dangerous gasses into the air, their restrictions can often make transporting goods, completing construction projects, and harvesting large crops more difficult. As an expert in the field of diesel emissions control, Dinex has long been the solution to this obstacle.
Continue reading Dinex Emission: The Solution to Diesel PollutionAbout the Bosch Mack E7 Diesel Engine Unit Pump System
We only carry parts from quality, reputable suppliers, to ensure you’re getting the best! That’s why we’re proud to carry Genuine Bosch components, like this unit pump system for the Mack E7.
Continue reading About the Bosch Mack E7 Diesel Engine Unit Pump SystemAbout the Bosch Diesel Engine Denoxtronic 2.2 Dosing Module and Supply Module | Highway & Heavy Parts
At Highway & Heavy Parts, we do parts differently! We won’t sell you just any part. We won’t just sell you the lowest price part. And we certainly won’t sell you a part from an inferior supplier.
Continue reading About the Bosch Diesel Engine Denoxtronic 2.2 Dosing Module and Supply Module | Highway & Heavy PartsDiesel Engine Product Spotlight: Mack Fuel System Components
It’s vital that the fuel system on your diesel engine is functioning properly. So, when it comes time to replace some of the fuel system components on your Mack diesel engine, you want to make sure that you’re getting the best!
Continue reading Diesel Engine Product Spotlight: Mack Fuel System ComponentsMack Trucks Update Natural-Gas Semi Tractors
Natural gas still hasn’t caught on as a fuel for private passenger vehicles, but it’s finding more success in commercial applications.
Continue reading Mack Trucks Update Natural-Gas Semi TractorsWhat are the advantages of VGTs?
It’s probably hard to believe that Variable Geometry Turbos have any advantages. They have a bad reputation as a big source of problems in the diesel world.
Continue reading What are the advantages of VGTs?Detroit Diesel DD13, DD15, DD16 Bosch Injectors | In stock NOW! – Call Us Today at 844.447.1453

Volvo D13 Fuel Injector (85013612)
Volvo D13 Fuel Injector | Injector Cups Failing Or Fuel In Oil? – HHP Has Your Needs Covered 844.447.1453

Your Premier Source for Mack Diesel Engine Parts
Highway and Heavy Parts is your trusted partner for high-quality Mack engine parts, delivering the precision components needed to keep your Mack trucks performing at their peak. Whether you’re operating highway haulers or vocational equipment, our comprehensive inventory supports all major Mack engine families.
Mack engines have proven to be the workhorses of the over-the-road drivers, and HHP is the workhorse of Mack engine parts. We provide premium parts for your Mack engine. All of our engine parts come with the best diesel engine customer service from ASE Certified Techs, and now, we have informational blogs to help you diagnose engine issues, find the right replacement parts, and tips on how to repair a diesel engine. Click around and read some diesel blogs.
Complete Mack Engine Coverage
MP Series Engine Solutions
Mack MP engines are renowned across the trucking industry for their power, reliability, and versatility.
From construction to refuse to highway hauling, these engines deliver consistent performance. Our inventory includes parts for the complete MP lineup:
MP7 Engine: The MP7 is a light-weight 11-liter engine designed to maximize payload with torque ratings from 1200 to 1560 lbs-ft. This efficient powerplant provides the perfect balance of power and fuel economy for medium to heavy-duty applications.
MP8 Engine: The Mack MP8 is a 13.0L inline-6 diesel engine, engineered for power, efficiency, and durability in heavy-duty trucking. Used in both Mack and Volvo trucks, the MP8 delivers high torque, excellent fuel economy, and reduced emissions, making it a top choice for long-haul, regional, and vocational applications.
Legacy E7 Engine Support
We continue to support the legendary Mack E7 engine with comprehensive parts availability. Despite being out of production, the E7 remains a reliable workhorse in many fleets, and we ensure you have access to the quality components needed for maintenance and rebuilds.
Quality Mack Components & Services
Engine Parts That Meet OEM Standards
HHP carries Mack truck engine parts that meet or exceed OEM specs. Save money and time by getting your diesel cylinder heads, fuel injectors, and engine rebuild kits from us. Our commitment to quality ensures every component delivers the durability and performance your Mack engines demand.
Comprehensive Parts Selection
From routine maintenance items to major rebuild components, our Mack parts inventory covers
cylinder heads, fuel injectors, turbochargers, gasket sets, and complete engine rebuild kits. Whether you’re servicing an MP7, MP8, MP10, or E7 engine, we have the parts you need.
Bundle Sales & Value Solutions
Highway and Heavy Parts is excited to introduce our diesel engine parts bundle sales promotion. It includes diesel cylinder heads and diesel engine add-ons for all major heavy-duty truck and equipment manufacturers. If you need a cylinder head for your Mack or other heavy-duty diesel engine, you can get everything you need to do the job right and save some money.
Why Choose Highway and Heavy Parts for Mack?
Expert Knowledge & Support
Our diesel engine experts understand the evolution of Mack engines from the mechanical E7 to the advanced MP series. We provide technical support and application guidance to help you select the right parts for your specific needs.
Proven Quality Standards
Every Mack component in our inventory undergoes rigorous quality control to ensure it meets or exceeds OEM specifications. We understand that reliability is paramount in commercial applications.
Browse Our Complete Mack Parts Catalog
Browse our complete Mack parts catalog today and experience the Highway and Heavy Parts difference for your heavy-duty diesel engine needs.






