SKU: 25157 | UPC: 084663251573
Moroso Chevy LS Exhaust Block Off Storage Plates – Pair (1997-2013 Cathedral Port Heads)
Moroso 25157 exhaust block off storage plates come as a pair to seal the exhaust ports on Chevy LS engines equipped with cathedral port cylinder heads. These plates protect against moisture, dirt, debris, and corrosion during off-season storage or transport. They provide a secure barrier for race engines and high-performance builds from 1997 to 2013.
Key Features
- Cast Aluminum Build: Heavy-duty construction resists warping and handles repeated use without degrading.
- O-Ring Seals: Viton O-rings create an airtight seal to fully block contaminants from entering ports.
- Precision Machined: Exact fit for OEM cathedral port exhaust ports ensures easy alignment and secure mounting.
- Mounting Hardware Included: Stainless steel bolts and washers provided for immediate installation.
- Sold as Pair: Covers both cylinder banks for complete engine protection in one package.
Product Notes
- Intended for storage only. remove plates before starting engine.
- Clean exhaust ports thoroughly prior to installation for best seal.
- Compact design fits easily in engine bays or storage crates.
Installation Notes
- Professional installation recommended.
- Uses factory exhaust manifold bolt holes and pattern.
- Torque bolts to 18-22 ft-lbs using thread locker for secure hold.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2004 | Chevrolet | Corvette | Base, Z06 |
| 1998-2002 | Chevrolet | Camaro | Z28, SS |
| 1998-2002 | Pontiac | Firebird | Formula, Trans Am |
| 2004-2006 | Pontiac | GTO | Base |
| 2005-2007 | Chevrolet | Corvette | Base |
| 2005-2006 | Chevrolet | SSR | Base |
| 2006-2009 | Chevrolet | Trailblazer SS | Base |
Why Choose Moroso?
- Trusted since 1958 for motorsports components.
- Engineered with high-grade materials for lasting performance.
- Exact tolerances from dedicated LS engine expertise.
Frequently Asked Questions
- Q: Do these fit rectangular port heads like LS3?
A: No, designed exclusively for cathedral port heads on LS1 LS2 LS6 engines. - Q: What material are the seals made from?
A: Durable Viton O-rings provide chemical resistance and reliable sealing against moisture. - Q: Does installation require special tools?
A: No, standard socket set works. hardware included and bolts to stock locations.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Protective box 9 x 7 x 2 inches
- Weight: 0.70 lbs
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