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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
Bosch High Pressure Fuel Function Block (includes PRV and RPS) 01-04 GM 6.6L Duramax LB7The LB7 Duramax as being the first of the light duty, common rail diesels to hit the market, sometimes did some things a bit different than those released later. One of these instances is the high pressure fuel function block as opposed to a traditional fuel rail. That said, the idea is still the same in that it houses the pressure relief valve (PRV) and rail pressure sensor (RPS) and is responsible for the distribution of highly pressurized fuel.
The LB7 Duramax as being the first of the light duty, common rail diesels to hit the market, sometimes did some things a bit different than those released later. One of these instances is the high pressure fuel function block as opposed to a traditional fuel rail. That said, the idea is still the same in that it houses the pressure relief valve (PRV) and rail pressure sensor (RPS) and is responsible for the distribution of highly pressurized fuel. Now, why would you need to replace this function block? As with any diesel, if you can't maintain adequate fuel pressure, the truck will run poorly, and if low enough, not at all. This function block houses two very important parts of ensuring adequate fuel rail pressure, being the PRV and RPS. The relief valve is responsible for controlling rail pressure and bleeding off anytime there is excessive pressure. However, over time, this valve can, and will, wear out causing rail pressure to bleed off before the set pressure has been reached. Secondly, the rail pressure sensor, as with all things, can fail, as well. When this happens, its unable to send an accurate signal of rail pressure to the ECM, so its unable to match desired versus actual rail pressure. If the ECM is unable to determine what the rail pressure actually is, it can over or underpressurize the system. If you're dealing with symptoms such as these, sometimes its easier to merely replace the entire block.Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 749 reviews
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Product Reviews
★★★★★ 5
Great Filter Set for Allergy‑Sensitive Families and MPG‑Minded Drivers
Size: 21-25 TLX, 18-25 Odyssey
I bought this set because I prefer handling routine maintenance myself, especially cabin and engine air filters, rather than paying dealership prices for simple jobs. The package included one cabin air filter and one engine air filter, plus a full backup set for the next service interval.
Both filters installed easily and fit the 2018 Honda Odyssey exactly as expected. No trimming, no forcing, and no alignment issues. The cabin filter seated cleanly in the glove‑box housing, and the engine filter dropped into the airbox without any airflow restriction or sealing gaps.
This setup is ideal for Odyssey owners who want to maintain optimal cabin air quality—especially helpful for families with allergies—and for drivers looking to keep engine airflow unrestricted for the best possible MPG and throttle response. It may not be necessary for anyone who relies exclusively on dealership service or doesn’t perform their own maintenance.
Overall, this is a straightforward, high‑value filter set that installs cleanly and supports both air quality and engine efficiency for DIY‑minded Odyssey owners.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Auto air filters
Size: 16-22 Pilot, 14-16 MDX
Perfect - product great - installation easy and much cheaper than having dealer or auto shop do it ——
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Great
Good quality and price. Perfect size fit. Easy to install
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Great Quality Filter and Perfect Fit for My 2022 CR-V
I bought this EPAuto air filter for my 2022 Honda CR-V 1.5L, and it couldn’t have been easier to install. It fits exactly like the original — snug and secure — and the whole process took under five minutes without any tools. Just open the air box, pull out the old filter, and drop this one in.
The quality feels solid with a sturdy frame and well-made filter material. It’s not flimsy at all, and you can tell it’s built to last. After swapping it in, I noticed the engine felt a bit smoother, and there was a slight improvement in responsiveness, especially during acceleration. I’m also hoping it helps with fuel efficiency over time.
Honestly, for the price and convenience, this is a no-brainer. It’s a simple upgrade you can do yourself that helps protect your engine and saves you money on dealership replacements. Highly recommended if you drive a newer CR-V like mine!
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Reviewed in the United States on July 24, 2025
★★★★★ 5
Honda air filter
I am very happy with the air filter, it fitted perfectly in my Honda Civic.
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Reviewed in the United States on May 4, 2026
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