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SKU: 400820 | UPC: 808422008204
Borla 400820 CrateMuffler SBC Hot 350/383 2.5 inch Offset/Center 14in x 4.35in x 9in Oval ATAK Muffler
Borla 400820 CrateMuffler delivers ATAK sound for Small Block Chevrolet high output 350/383/406 CID V8 crate and custom engines. This 2.5-inch offset inlet/center outlet oval muffler increases power and torque while cutting drone for thrilling exhaust note. Install it to gain fuel economy, extend engine life, and add motorsport style to any SBC build.
Key Features
- ATAK Sound Technology: Aggressive Borla sound of power tuned specifically for SBC 350/383/406 crate engines, delivers heart-pounding throttle response and zero drone on direct-fit applications.
- T-304 Stainless Steel Build: Premium all-welded construction outlasts T-400 series steels, resists corrosion for long-term performance in street and track use.
- Precise Sizing: 14-inch body length x 4.35-inch height x 9.1-inch width oval shape, 19-inch overall length, 2.5-inch inlet/outlet diameters for seamless integration.
- Directional Design: Offset inlet to center outlet with welded bracket on outlet endcap identifies flow direction for custom-tuned acoustics per engine family.
- Million-Mile Warranty: Borla backs every CrateMuffler with unlimited mileage coverage, reflecting confidence in CNC-machined quality.
Product Notes
- Muffler is directional—mount with bracketed endcap as outlet for optimal sound and drone reduction.
- Designed exclusively for crate and custom SBC high output motors; pipe-connect inlet/outlet types match OEM.
- Secure packaging protects against shipping damage; weight is 9 lbs for easy handling.
Installation Notes
- Professional installation recommended.
- Verify engine family match and orient using outlet bracket before welding or clamping.
- Compatible with 2.5-inch exhaust piping; all-welded body requires no internal maintenance.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1955-2024 | Chevrolet | Small Block Crate V8 | 350/383/406 High Output |
| 1967-1981 | Chevrolet | Camaro | SS w/ 350/383 Crate |
| 1965-1982 | Chevrolet | Corvette | w/ 350/383 Crate |
| 1964-1987 | Chevrolet | Chevelle | SS w/ 350/383 Crate |
| 1955-1957 | Chevrolet | Bel Air | w/ 350/383 Crate |
Why Choose Borla?
- Two decades pioneering stainless steel exhaust for classics to modern performance vehicles.
- Focuses on power gains, torque, and signature sound that excites enthusiasts.
- CNC precision ensures exact fit and unmatched durability from the winning exhaust brand.
Frequently Asked Questions
-
Q: Which engines is the Borla 400820 designed for?
A: Chevrolet Small Block 350/383/406 CID V8 high output crate engines in custom, hot rod, and resto-mod builds; directional tuning eliminates drone. -
Q: What material and construction does it use?
A: T-304 stainless steel with all-welded body for corrosion resistance and strength beyond common 409-grade steels. -
Q: What warranty coverage is included?
A: Million-Mile Warranty covers defects in materials and workmanship for the original purchaser.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective cardboard box, 21in x 10in x 10in dimensions
- Weight: 9 lbs
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