HSP Diesel 2001-2010 Chevrolet / GMC LB7 LLY LBZ LMM Duramax Mega Filter Retrofit Kit
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Colours and prices as published by HSP Diesel · verified 9/8/2026
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HSP Mega Filter Retrofit Kit for 2001–2010 Duramax HSP 4.5” Intakes Upgrade your existing HSP 4.5” intake with the HSP Mega Filter Retrofit Kit. This kit converts earlier PRIOR TO 3/12/2026 HSP intake systems to the latest square Mega Filter and aluminum heatshield box design, delivering improved airflow, increased filtration area, and easier serviceability. Why You Need the HSP Mega Filter Retrofit Kit The new square HSP Mega Filter flows approximately 10% more air than the previous round filter design and offers 13% more filter surface area. This added filtration area not only improves airflow but also helps extend the interval between filter cleanings. The redesigned aluminum heatshield box improves accessibility and maintenance. The removable lid clamps down securely on the filter and can be removed quickly with a standard Phillips screwdriver, making servicing faster and easier. Key Features Upgrades older HSP 4.5” intakes to the newest Mega Filter system Square Mega Filter provides increased airflow and filtration area Aluminum heatshield box improves durability and serviceability Quick-access lid design for easy filter maintenance Designed specifically for HSP 4.5” intake systems What's Included 1x 4.5" Heatshield Box (HSP-IN-748) 1x Heatshield Box Lid (HSP-IN-748-1) 1x 4.5" Mega Filter (RFB-514-1-RFAB) 4x 1/8" Aluminum Rivets (RFB-098-RFAB) 3x Black Nylon Push Retainers (RFB-095-RFAB) 1x Heatshield Box Lid Backer Plate (RFB-746-BP-RFAB) 1x Skinny Trim Lock (RFB-1701-RFAB) Compatible Intake Systems This retrofit kit is designed to fit the following HSP 4.5” intake systems: 102-HSP – LB7 Intake 202-HSP – LLY Intake 302-HSP – LBZ Intake 402-HSP – LMM Intake
Note:
This kit does not fit 4” HSP intake systems. Tuning Note Some trucks may require a MAF scaling tune revision due to the increased airflow from the Mega Filter. Failure to adjust the tune may result in a check engine light. Overview 10% increased airflow compared to previous round filter design 13% larger filtration surface area Improved engine airflow and filtration performance Upgraded aluminum heatshield box Serviceable lid design for quick maintenance Direct retrofit for HSP 4.5” intake systems Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP we believe in our products and stand firmly behind every single one that leaves our facility. For years we have taken care of almost everything and anything that our customers had issues with—even without a formal warranty policy. That commitment hasn’t changed. With the HSP No BS Limited Lifetime Warranty, we’ve simply put it in writing. For more information about our Lifetime, No BS Warranty click HERE.
HSP Mega Filter Retrofit Kit for 2001–2010 Duramax HSP 4.5” Intakes Upgrade your existing HSP 4.5” intake with the HSP Mega Filter Retrofit Kit. This kit converts earlier PRIOR TO 3/12/2026 HSP intake systems to the latest square Mega Filter and aluminum heatshield box design, delivering improved airflow, increased filtration area, and easier serviceability. Why You Need the HSP Mega Filter Retrofit Kit The new square HSP Mega Filter flows approximately 10% more air than the previous round filter design and offers 13% more filter surface area. This added filtration area not only improves airflow but also helps extend the interval between filter cleanings. The redesigned aluminum heatshield box improves accessibility and maintenance. The removable lid clamps down securely on the filter and can be removed quickly with a standard Phillips screwdriver, making servicing faster and easier. Key Features Upgrades older HSP 4.5” intakes to the newest Mega Filter system Square Mega Filter provides increased airflow and filtration area Aluminum heatshield box improves durability and serviceability Quick-access lid design for easy filter maintenance Designed specifically for HSP 4.5” intake systems What's Included 1x 4.5" Heatshield Box (HSP-IN-748) 1x Heatshield Box Lid (HSP-IN-748-1) 1x 4.5" Mega Filter (RFB-514-1-RFAB) 4x 1/8" Aluminum Rivets (RFB-098-RFAB) 3x Black Nylon Push Retainers (RFB-095-RFAB) 1x Heatshield Box Lid Backer Plate (RFB-746-BP-RFAB) 1x Skinny Trim Lock (RFB-1701-RFAB) Compatible Intake Systems This retrofit kit is designed to fit the following HSP 4.5” intake systems: 102-HSP – LB7 Intake 202-HSP – LLY Intake 302-HSP – LBZ Intake 402-HSP – LMM Intake
Note:
This kit does not fit 4” HSP intake systems. Tuning Note Some trucks may require a MAF scaling tune revision due to the increased airflow from the Mega Filter. Failure to adjust the tune may result in a check engine light. Overview 10% increased airflow compared to previous round filter design 13% larger filtration surface area Improved engine airflow and filtration performance Upgraded aluminum heatshield box Serviceable lid design for quick maintenance Direct retrofit for HSP 4.5” intake systems Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP we believe in our products and stand firmly behind every single one that leaves our facility. For years we have taken care of almost everything and anything that our customers had issues with—even without a formal warranty policy. That commitment hasn’t changed. With the HSP No BS Limited Lifetime Warranty, we’ve simply put it in writing. For more information about our Lifetime, No BS Warranty click HERE.
HSP offers a limited lifetime warranty to the original purchaser on eligible HSP products. Underhood powder coating has separate two-year limited coverage. Non-HSP brands follow their own manufacturer warranties. Discontinued products and customer/installer damage are excluded. Claim authorization is required; customer pays inbound shipping for ordinary claims.
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
HSP Diesel warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
- Return eligibility
- HSP states returns must be postmarked within 30 days of purchase, new and unused with original tags and packaging, with an approved RMA. A 15% restocking fee and customer-paid return shipping apply. Special orders, non-HSP dropship products, apparel, used items and custom colors are excluded. Based on what HSP Diesel offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- HSP Diesel
- Warranty duration
- Product-specific duration not stated; see supplier terms
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- HSP Diesel
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.