Holley 120-521 RetroFilter Dual-Snorkel Air Cleaner Features:

• Full EFI functionality is hidden in a traditional looking air cleaner
• 3 in. tall, pre-oiled, washable, and reusable premium cotton gauze air filter element
• Adapts to GM LS style drive-by-wire throttle bodies found on LS2, LS3, LS7, and other engines
• 92 mm opening is compatible with most 4-bolt pattern LS throttle bodies
• Stamped aluminum lid and base

Holley 120-521 RetroFilter Dual-Snorkel Air Cleaner Notes:

• Requires Holley 17-93 EFI Drive-By-Wire Throttle Body Adapter (sold separately) if using a 4150 or 4160 square bore flange style manifold
• GM Gen V LT DBW throttle bodies may share the same bolt pattern but will not fit properly

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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