Upgrade your existing HSP 4.5 inch 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 percent more air than the previous round filter design and offers 13 percent 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 inch 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 inch intake systems

What's Included:

• 1x 4.5 inch Heatshield Box (HSP-IN-748)
• 1x Heatshield Box Lid (HSP-IN-748-1)
• 1x 4.5 inch Mega Filter (RFB-514-1-RFAB)
• 4x 1/8 inch 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 inch 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 inch 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 percent increased airflow compared to previous round filter design
• 13 percent 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 inch intake systems

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.