RetroFilter air cleaners hide an LS drive-by-wire throttle body inside a classic-look housing, keeping a low profile while retaining modern EFI functionality. This dual-snorkel variant hides the DBW wiring out of sight, so the vintage look stays intact.
Specifications:
- Diameter: 14 Inch
- Filter Height: 3 Inch
- Filter Type: Cotton Gauze
- Base Style: 4150
- Snorkel Style: Dual Snorkel, Oval
- Material: Aluminum
- Finish: Chrome
- Part Number: 120-520
Adapts to LS-style drive-by-wire throttle bodies (LS2/LS3/LS7 recommended; L33, L76, and L92 should also fit) and pairs with any Holley intake manifold using a 4150/4160 square-bore flange. A 4150/4160 adapter (Holley EFI part # 17-93) is required to complete the connection. Note that some Gen V LT DBW throttle bodies share a similar bolt pattern but will not fit properly.
FAQ
What throttle bodies fit the Holley 120-520 RetroFilter?
LS-style drive-by-wire throttle bodies with a 4-bolt pattern; LS2, LS3, and LS7 are recommended, and L33, L76, and L92 should also fit. Gen V LT DBW throttle bodies share a similar bolt pattern but do not fit properly.
What makes this a dual-snorkel design?
It uses a 14-inch oval housing with dual intake snorkels rather than the round 16-inch single-snorkel design.
What intake manifolds does this air cleaner work with?
Any Holley intake manifold with a 4150/4160 square-bore flange, using the Holley EFI 17-93 adapter to connect.
