SKU: ALL 25947
UPC: 848238056327
MPN: ALL25947
The Allstar Performance Sure Seal Spacer 2in solves a common problem in performance engine builds: inadequate clearance between the carburetor and air cleaner assembly. This aluminum spacer adds two inches of height while maintaining an airtight seal that eliminates unwanted air leaks into the induction system. Designed for builders who demand precise air/fuel metering, the Sure Seal system uses an O-ring interface rather than traditional gaskets, which tend to compress and fail over time. Racers and street performance enthusiasts rely on this spacer to protect their tune from uncalibrated air intrusion.
Allstar Performance engineered this spacer from aluminum for durability without excessive weight, coming in at just under one pound. The 5-1/8 inch carburetor flange fits standard four-barrel applications, and the natural aluminum finish resists corrosion in engine bay environments. Dimensions measure 11.05 inches long by 8.05 inches wide with a 2.2-inch height profile. The Sure Seal design differs from conventional spacers by incorporating a replaceable O-ring (part number ALL26087) that creates positive sealing pressure against both mating surfaces. This prevents the gradual seal degradation that plagues fiber gasket setups, particularly in applications that see significant heat cycling or vibration. The machined surfaces ensure consistent contact across the full sealing area.
This spacer earns its place in drag cars, circle track builds, and high-output street machines where consistent air/fuel ratios determine whether you run fast or go home. The added two inches of carburetor-to-air-cleaner clearance accommodates taller velocity stacks, larger chokes, or simply provides hood clearance in tight engine compartments. When building or maintaining performance vehicles, having the right hardware matters as much as the major components. We stock a full range of parts and accessories for serious builders who understand that details make the difference between a car that runs and a car that wins.
| Specification | Detail |
|---|---|
| Brand | ALLSTAR PERFORMANCE |
| Model/MPN | ALL25947 |
| SKU | ALL 25947 |
| UPC | 848238056327 |
| Shipping Weight | 0.92 lbs |
| Material | Aluminum |
| Dimensions | 11.05" L × 8.05" W × 2.2" H |
| Thickness | 2 in |
| Carburetor Flange Size | 5-1/8 in |
| Finish | Natural |
| Compatibility | Carburetor to air cleaner assembly |
| Replacement O-Ring | ALL26087 |
This spacer features a 5-1/8 inch carburetor flange, which is the standard bolt pattern for most four-barrel carburetors including Holley, Edelbrock, and similar performance carbs. Verify your specific carburetor's base dimensions before ordering.
The Sure Seal design uses an O-ring interface that maintains consistent sealing pressure over time. Traditional fiber or paper gaskets compress, dry out, and eventually leak, allowing uncalibrated air into the intake. The O-ring system stays sealed through repeated heat cycles and engine vibration.
Yes. Allstar Performance offers a replacement O-ring under part number ALL26087. We recommend keeping a spare on hand for rebuild situations or if the original seal shows signs of wear after extended use.
This spacer adds a full 2 inches of clearance. The overall height profile measures 2.2 inches, accounting for the sealing surfaces. This clearance accommodates taller velocity stacks, larger air cleaners, or resolves hood clearance issues in tight engine bays.
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