Borla 400843 CrateMuffler SBC Hot 350/383 3.0 inch Offset/Center 14in x 4.35in x 9in Oval S-Type Muffler
Sound: S-Type
Configuration: Offset/Center
Inlet: 3" Outlet: 3"
Fits these Vehicles:
CrateMuffler® Small Block Chevrolet High Output 350/ 383/ 406 V8.
CrateMuffler®s are tuned for specific engines
When installed on cataloged applications, they will reduce, or eliminate drone
Mufflers have directional flow. Outlet end has mounting bracket on it.
Add resonator 400939 to attain the Touring sound level
BORLA®'s CrateMuffler® is the world's first muffler purpose-built to optimize the sound & power of crate and custom built motors. The mufflers are directional. The outlet can be identified by the mounting bracket welded to the endcap. The directional design provides custom sound, tuned for each engine family and will dramatically reduce, or eliminate drone on specified applications. Built from premium T-304 stainless steel, superior to T-400 series (such as 409), to give you the absolute best in performance and durability. Precision computer-controlled CNC manufacturing ensures an accurate fit and best of all, BORLA® stands behind every CrateMuffler® with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.
- AUTHORIZED DEALER - AUTHENTIC PART
- WARRANTY INCLUDED
- FREE 30 DAY RETURNS
Part Brand: Borla
Part Number: 400843
Borla 400843 CrateMuffler SBC Hot 350/383 3.0 inch Offset/Center 14in x 4.35in x 9in Oval S-Type Muffler
Sound: S-Type
Configuration: Offset/Center
Inlet: 3" Outlet: 3"
Fits these Vehicles:
CrateMuffler® Small Block Chevrolet High Output 350/ 383/ 406 V8.
CrateMuffler®s are tuned for specific engines
When installed on cataloged applications, they will reduce, or eliminate drone
Mufflers have directional flow. Outlet end has mounting bracket on it.
Add resonator 400939 to attain the Touring sound level
BORLA®'s CrateMuffler® is the world's first muffler purpose-built to optimize the sound & power of crate and custom built motors. The mufflers are directional. The outlet can be identified by the mounting bracket welded to the endcap. The directional design provides custom sound, tuned for each engine family and will dramatically reduce, or eliminate drone on specified applications. Built from premium T-304 stainless steel, superior to T-400 series (such as 409), to give you the absolute best in performance and durability. Precision computer-controlled CNC manufacturing ensures an accurate fit and best of all, BORLA® stands behind every CrateMuffler® with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.
Vehicle Fitment
Universal fit -- designed for small-block Chevrolet 350/383/406 crate or custom-built engines
Fitment Notes
Offset/center 3″ inlet/outlet -- directional muffler (outlet side marked with bracket)
Intended for dual-muffler systems; sold individually -- use two for best sound balance
Requires cutting and welding for installation -- not bolt-on
Features
Premium T‑304 stainless steel construction with CNC precision for strength and rust resistance
S‑Type sound profile -- aggressive tone under load with low highway drone
Directional design tuned to reduce drone on small-block Chevy powerplants
Brushed finish and outlet bracket facilitate custom exhaust routing
Made in USA -- backed by Borla’s Million‑Mile Warranty
Specifications
Part Number: 400843
Inlet/Outlet: 3″ diameter, offset inlet, center outlet
Body Dimensions: 14″ L × 9″ W × 4.35″ H; Overall length: 19″
Sound Series: S‑Type (moderately aggressive)
Included Components
1× Borla CrateMuffler 3″ offset/center
Product Description
The Borla 400843 S‑Type CrateMuffler is the world’s first muffler engineered specifically for small-block Chevy 350–383–406 crate or custom-built engines. Constructed from aircraft-grade T‑304 stainless steel with precision CNC manufacturing, this muffler delivers aggressive power under throttle while keeping cabin drone minimal at cruising speeds. The directional 3″ offset inlet and center outlet are mounted via a bracket for custom exhaust configuration.
Designed for dual-muffler setups (sold individually), the 400843 produces a deep, performance-focused tone tailored to Chevy powerplants and is covered by Borla’s Million-Mile Warranty. Ideal for builders seeking quality, sound control, and durability in crate-engine exhaust rules.
*Parts are for USA spec vehicles, please contact us to verify fitment on JDM & international models.
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Any returns received installed, mounted, used or missing components will be subject to return fee's.
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