# Highway and Heavy Parts \| Diesel Engine Parts: A leading provider of quality diesel engine parts\.

> Shop HHP \- quality diesel engine parts for heavy\-duty trucks, construction, oil and gas, and ag equipment\. Great prices, fast shipping, ASE Certified Techs\.

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## Pages
- [HHP Reviews](https://highwayandheavyparts.com/hhp-reviews/)
- [Home Page](https://highwayandheavyparts.com/)
- [HHP Manufactured Parts](https://highwayandheavyparts.com/hhp-manufactured-parts/)
- [Shop by Part Categories](https://highwayandheavyparts.com/shop-by-part-categories/)
- [HHP Pro Benefits Program](https://highwayandheavyparts.com/hhp-value-program/)

## Posts
- [How to Reduce Diesel Engine Fuel Consumption \(What Actually Works\)](https://highwayandheavyparts.com/blog/reduce-diesel-engine-fuel-consumption/): How to Instantly Cut Fuel Costs on Your Diesel Engine \(Without Expensive Upgrades\)
- [Diesel Prices Around the World in April 2026](https://highwayandheavyparts.com/blog/diesel-prices-around-the-world-april-2026/): Diesel prices around the world varied widely in April 2026\. See the latest global average, compare countries, and understand what rising or lower fuel costs mean for diesel operations\.
- [Bad Diesel Injector Symptoms: How to Diagnose a Failing Fuel Injector](https://highwayandheavyparts.com/blog/how-diagnose-a-bad-diesel-fuel-injector/): Bad diesel injector symptoms often start small—hard starting, rough idle, or excess smoke—but quickly lead to serious engine problems\. Learn how to diagnose a failing fuel injector and prevent costly damage\.
- [Buy Now, Pay Later: Finance Diesel Engine Parts](https://highwayandheavyparts.com/blog/sezzle-paypal-pay-in-4-financing-blog/)
- [Dinex Exhaust \& Emission: OEM Alternative Solutions for Repair Shops](https://highwayandheavyparts.com/blog/dinex-quality-products-through-hhp/)

## Products
- [Cummins Rear Crankshaft Seal Kit, New \(5405392\)](https://highwayandheavyparts.com/product/cummins-rear-crankshaft-seal-kit-new-5405392/)
- [Detroit Diesel Valve Cover Gasket, New \(631210\)](https://highwayandheavyparts.com/product/detroit-diesel-valve-cover-gasket-new-631210/)
- [Cummins ISX V\-Band Clamp, New \(2871863\)](https://highwayandheavyparts.com/product/2871863-v-band-clamp-for-cummins-isx-new/)
- [International/Navistar Diesel Oxidation Catalyst \(DOC\), New \(2605802C1\)](https://highwayandheavyparts.com/product/international-navistar-diesel-oxidation-catalyst-doc-new-2605802c1/)
- [International/Navistar Diesel Particulate Filter \(DPF\), New \(2604873C91\)](https://highwayandheavyparts.com/product/international-navistar-diesel-particulate-filter-dpf-new-2604873c91/)

## Categories
- [Blog \- All HHP Blog Articles](https://highwayandheavyparts.com/category/all-blog-articles/)
- [Blog \- Diesel Engine News \& Updates](https://highwayandheavyparts.com/category/diesel-news-updates/)
- [Diesel Tips and Diagnostics](https://highwayandheavyparts.com/category/diesel-tips-and-diagnostics/)
- [Caterpillar Engine Parts \& Heavy\-Duty Components](https://highwayandheavyparts.com/category/caterpillar/)
- [Cummins Diesel Engine Parts \& Components](https://highwayandheavyparts.com/category/cummins/)

## Tags
- [Product Highlight](https://highwayandheavyparts.com/tag/product-highlight/)
- [Tech Tips](https://highwayandheavyparts.com/tag/tech-tips/)
- [Diesel Diagnosis](https://highwayandheavyparts.com/tag/diesel-diagnosis/)
- [Ask The Experts](https://highwayandheavyparts.com/tag/ask-the-experts/)
- [Diesel News](https://highwayandheavyparts.com/tag/diesel-news/)

## Product categories
- [Interstate McBee Parts](https://highwayandheavyparts.com/product-category/vendor-categories/interstate-mcbee-parts/)
- [Caterpillar](https://highwayandheavyparts.com/product-category/caterpillar-heavy-duty-diesel-engine-parts/)
- [Gaskets](https://highwayandheavyparts.com/product-category/shop-hhp-diesel-parts-all-gaskets/)
- [Cummins](https://highwayandheavyparts.com/product-category/cummins-heavy-duty-diesel-engine-parts/)
- [Miscellaneous](https://highwayandheavyparts.com/product-category/shop-hhp-diesel-parts-all-miscellaneous/)

## Product tags
- [Engine Serial Number](https://highwayandheavyparts.com/product-tag/engine-serial-number/)
- [Package Qty: 1](https://highwayandheavyparts.com/product-tag/package-qty-1/)
- [Rod Bearing Sizes](https://highwayandheavyparts.com/product-tag/rod-bearing-sizes/)
- [Main Bearing Sizes](https://highwayandheavyparts.com/product-tag/main-bearing-sizes/)
- [core](https://highwayandheavyparts.com/product-tag/core/)

## Product shipping classes
- [Standard](https://highwayandheavyparts.com/?taxonomy=product_shipping_class&term=standard)
- [Freight Only](https://highwayandheavyparts.com/?taxonomy=product_shipping_class&term=truck-freight-required)

## Product Condition
- [New](https://highwayandheavyparts.com/condition/new/)
- [Remanufactured](https://highwayandheavyparts.com/condition/remanufactured/)

## Product CPL/ESN Prefix
- [6NZ](https://highwayandheavyparts.com/cpl-esn-prefix/6nz/)
- [5EK](https://highwayandheavyparts.com/cpl-esn-prefix/5ek/)
- [4MG](https://highwayandheavyparts.com/cpl-esn-prefix/4mg/)
- [7FB](https://highwayandheavyparts.com/cpl-esn-prefix/7fb/)
- [MXS](https://highwayandheavyparts.com/cpl-esn-prefix/mxs/)

## Optional
- [Sitemap index](https://highwayandheavyparts.com/wp-sitemap.xml)