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SKU: 68815 | UPC: 84663688157
Moroso Filtered Valve Cover Breather Clamp-On No Hood 1-3/8in ID
This Moroso Filtered Valve Cover Breather provides reliable crankcase ventilation for performance engines. The clamp-on design fits standard 1-3/8in valve cover grommets on Chevy small block big block and LS engines plus Ford Windsor and Cleveland V8s. It filters incoming air to block contaminants while venting pressure to maintain engine efficiency.
Key Features
- Clamp-On Mounting: Secures directly over grommet with included stainless steel clamp for tool-free installation and secure hold during high RPM operation.
- High-Efficiency Filter: Captures dirt dust and debris from breather air intake protecting PCV system valves and engine internals from contamination.
- No Hood Design: Open top allows quick filter inspection and cleaning plus provides visible crankcase pressure indicator for racers.
- Black Anodized Aluminum: Die-cast construction resists corrosion heat and oil exposure for long-lasting performance in harsh engine bay conditions.
- 1-3/8in Inner Diameter: Matches OEM and aftermarket valve cover grommets precisely ensuring airtight seal without leaks or modifications.
Product Notes
- Intended for PCV breather use or open crankcase venting on naturally aspirated or boosted engines.
- Service filter element every 10k miles or annually based on track or street use.
- Compact 2-1/2in height clears most stock hoods and close-clearance setups.
Installation Notes
- Professional installation recommended.
- Slide breather over clean 1-3/8in grommet then tighten clamp to 10-15 in-lbs torque.
- Uses rubber grommet for seal. inspect and replace OEM grommet if cracked or hardened.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1955-2000 | Chevrolet | Small Block 262-400 | All |
| 1965-1996 | Chevrolet | Big Block Mark IV 396-454 | All |
| 1997+ | Chevrolet / GM | LS LT Series | All |
| 1962-1995 | Ford | 289 302 351W | All |
| 1970-1996 | Ford | 351C 351M 400 | All |
| Universal | Mopar | LA RB Hemi V8 | 1-3/8in Grommet |
Why Choose Moroso?
- Trusted since 1958 by NHRA Top Fuel and Funny Car champions for race-proven reliability.
- Engineered and manufactured in the USA with focus on drag racing and street performance demands.
- Exact tolerances and quality materials ensure consistent fit and function across thousands of applications.
Frequently Asked Questions
-
Q: Will this breather fit my LS engine valve covers?
A: Yes it clamps onto standard 1-3/8in rubber grommets found on GM LS LT1 LS1 LS3 LS7 and aftermarket LS valve covers for direct compatibility. -
Q: What is the breather made from?
A: Die-cast aluminum body with black anodized finish plus stainless steel clamp and foam filter element for durability and filtration. -
Q: What warranty coverage applies?
A: Moroso provides limited lifetime warranty against manufacturing defects when installed and used as directed.
Shipping & Handling
- Method: UPS Ground / USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective retail box 3in x 3in x 3in
- Weight: 0.2 lbs
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