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SKU: 400840 | UPC: 808422008402
Borla 400840 CrateMuffler Chevrolet Small Block 350/383/406 CID V8 High Output 3" Offset/Offset S-Type Oval Muffler
The Borla 400840 CrateMuffler is purpose-built for Small Block Chevrolet high output 350/383/406 CID V8 crate and custom engines. It delivers aggressive Borla sound, gains in horsepower and torque, better fuel economy, and drone elimination through directional tuning. Install this 14" x 4.35" x 9.1" oval muffler for precise fit and motorsport performance in hot rods, muscle cars, and engine swaps.
Key Features
- T-304 Stainless Steel: Corrosion-resistant material ensures durability in all conditions.
- Directional Design: Tuned for SBC engine family with outlet marked by welded bracket to cut drone.
- Precise Sizing: 14" body length, 19" overall, 3" offset inlet/outlet for seamless 3" piping integration.
- CNC Manufacturing: Computer-controlled production for exact fit and flow efficiency.
- Engine-Specific Tuning: Optimizes sound and power for 350/383/406 CID high output V8s.
Product Notes
- Muffler is directional; align outlet end with bracket toward rear of vehicle.
- Intended for crate and custom high output Small Block Chevy V8 builds.
- Ships ready for 3" exhaust systems with pipe-style connections.
Installation Notes
- Professional installation recommended.
- Verify inlet/outlet orientation before welding or clamping.
- Compatible with standard 3" exhaust hangers and hardware.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Crate Engines | Chevrolet | Small Block V8 | 350/383/406 CID High Output |
| Custom Builds | Chevrolet | SBC Engine Swap | Hot Rod/Muscle Car |
Why Choose Borla?
- Pioneer in stainless steel exhaust for classics and race cars.
- Delivers power gains, torque, and signature exhaust note.
- Million-Mile Warranty covers every CrateMuffler.
Frequently Asked Questions
-
Q: Which engines fit this CrateMuffler?
A: Designed for Chevrolet Small Block 350/383/406 CID V8 high output crate and custom motors. -
Q: What material construction?
A: T-304 stainless steel, all-welded for strength and rust resistance. -
Q: What warranty coverage?
A: Backed by Borla Million-Mile Warranty for performance and longevity.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Original Borla box, 21" x 10" x 10"
- Weight: 11 lbs
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