This mounting hardware assembly is built specifically for Holley Tall LS valve covers and is sold as a single replacement component. It pairs a polished Holley Tall LS valve cover bolt (M6 x 1.0 thread) with an aluminum spacer and an OE-style LS valve cover grommet.
Specifications:
- Application: Holley Tall LS Valve Covers
- Quantity: 1 (single assembly)
- Finish: Polished
- Thread: M6 x 1.0
- Hex Height: Tall, 9mm hex size
- Spacer Included: Yes
- Grommet(s) Included: Yes
- Warning: California Proposition 65
- Warranty: Manufacturer's Limited 90 Day Warranty
- Part Number: 561-133
Fits Holley Tall LS valve covers with extended-length hardware assemblies only. Torque mounting bolts to 106 in/lb (9 ft/lb).
FAQ
What does the 561-133 include?
A single polished M6 x 1.0 valve cover bolt assembly with an aluminum spacer and an OE-style grommet.
Which valve covers is this hardware compatible with?
Holley Tall LS valve covers with extended-length hardware assemblies only.
What torque spec should I use?
Torque the mounting bolt to 106 in/lb (9 ft/lb).
Is a full 8-piece set available?
Yes, Holley offers a complete 8-piece set (P/N 561-134) if you need to replace all the hardware at once.

