Borla 400843 S-Type Crate-Muffler 3" Offset/Center for SB Chevy 350/383/406

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 x 9" W x 4.35" H; Overall length: 19"
• Sound Series: S-Type (moderately aggressive)

Included Components

• 1x 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.