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Borla Big Block Chevrolet 396/402/427 2.5in Offset Inlet / 2.5in Center Outlet Crate Muffler

SKU: BOR400851

Mufflers

BOR S-Type Muffler...

Borla Big Block Chevrolet 396/402/427 2.5in Offset Inlet / 2.5in Center Outlet Crate Muffler

SKU: BOR400851

Mufflers

BOR S-Type Muffler...

A$705.75
Available from MFR. In stock at 1 location (4 available)

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Description

CrateMuffler

BORLA(r)'s CrateMuffler(r) 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. This muffler is tuned for the Chevrolet Big Block 396/ 402/ 427 CID V8 engine family. The directional design provides the classic S-Type sound and will dramatically reduce, or eliminate drone on specified applications. Add resonator 400938 to attain the Touring sound. Muffler dimensions 2.5" Offset Inlet/ 2.5" Center Outlet, 4.35" x 9.10" Oval, 14" Long Body, 19" Overall Length. 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 numerical control (CNC) manufacturing ensures an accurate fit and best of all, BORLA(r) stands behind every CrateMuffler(r) with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Additional Information

CrateMuffler, Chevrolet Big Block 396/ 402/ 427 CID V8 Stock Output, 2.5" Offset Inlet/ 2.5" Center Outlet, 4.35" x 9.10" Oval, 14" Long Body, 19" Overall Length, S-Type.

Part Type

Exhaust Muffler

Product Overview

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.


Data: v2 - Desc: v4.2 - Upd: 2026-11-07 17:21:27

Data: v4.2 - Upd: 2026-11-09 01:07:17

Features

  • 2.5" Offset Inlet/ 2.5" Center Outlet, 4.35" x 9.10" Oval, 14" Long Body, 19" Overall Length
  • Add resonator 400938 to attain the Touring sound level
  • CrateMuffler(r)s are tuned for specific engines
  • Mufflers have directional flow. Outlet end has mounting bracket on it.
  • When installed on cataloged applications, they will reduce, or eliminate drone

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Body Height (in.):OEM
Body Height:OEM
Body Length (in.):OEM
Body Length:OEM
Body Width (in.):OEM
Body Width:OEM
Construction:All Welded
Description:CrateMuffler; Offset/Center; 2.5 in.; 14 in. x 4.35 in. x 9 in. Case Body; Oval; For BBC 396; S-Type Sound; T-304 Stainless Steel;
Grade Type:Performance
Inlet Connection Type:Pipe
Inlet Outside Diameter:2.500 in.
Inlet Position:OEM
Inlet Size (in.):2.5
Inlet Type:OEM
Main Piping Diameter:2.500 in.
Material:T-304 Stainless Steel
Muffler Count:1
Off Road Use Only:No
Outlet Outside Diameter:2.500 in.
Outlet Position:Center
Outlet Size (in.):2.5
Outlet Type:OEM
Overall Length (in.):OEM
Overall Length:OEM
Part Number:bor400851
Shape:Oval
Title Extended:CrateMuffler Chevrolet Big Block Stock Output 396/402/427 CID 2.5in Offset/Center 14inx4.35inx9.10in S-Type Part # 400851
Title:CrateMuffler Muffler Chevrolet Big Block 396/ 402/ 427 CID V8 Stock Output 2.5in Offset Inlet/ 2.5in Center Outlet S-Type

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Borla, Borla Exhaust
StreetFX SKU bor400851
SFX Item ID 4224640
Accounting SKU bor-400851
Manufacturer SKU 400851
Manufacturer UPC 808422008518
Alternative References 400851, BOR-400851

Muffler, S-Type CrateMuffler, Oval, Stainless, Brushed, 2.50 in. Offset Inlet, 2.50 in. Center Outlet, Chevy, Each

"Lead the Heard" with Borla S-Type CrateMufflers. Specifically designed, engineered, and tuned to optimize the power and sound of your classic stock, crate, or custom-built engine, they deliver the intoxicating Borla "Sound of Power" with every squeeze of the throttle. They feature an enhanced combination of packing filament, straight-through core dimensions, perforation patterns, and cylindrical shapes. Purpose-built from aircraft-grade, T-304 stainless steel, they offer a race-inspired design to relieve the most restriction possible and bring the most power out of your engine. They feature an easily maintained finish, ensuring long-lasting showroom looks.

Product Attributes
BrandBorla
Manufacturer's Part Number400851
Part TypeMufflers
Product LineBorla S-Type CrateMufflers
UPC808422008518
Muffler Material304 stainless steel
Inlet Diameter (in.)2.50 in.
Outlet Diameter (in.)2.50 in.
Inlet Quantity1
Outlet Quantity1
Inlet LocationOffset
Outlet LocationCenter
Case ShapeOval
ReversibleNo
Muffler FinishBrushed
Case Exterior Length (in.)14.00 in.
Thickness (in.)4.350
Width (in.)9.000 in.
End Cap MaterialStainless steel
End Cap ColorNatural
RemanufacturedNo
QuantitySold individually.
NotesS-Type style muffler. Tuned for 396 Chevrolet engine. This muffler is directional.

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