Home / Shop / Borla Universal Oval Transverse 2.5in Inlet/Outlet 19in x 10.25in x 5.5in Turbo XL Muffler

Borla Universal Oval Transverse 2.5in Inlet/Outlet 19in x 10.25in x 5.5in Turbo XL Muffler

SKU: BOR40477

Mufflers

BOR Universal Mufflers...

Borla

Borla Universal Oval Transverse 2.5in Inlet/Outlet 19in x 10.25in x 5.5in Turbo XL Muffler

SKU: BOR40477

Mufflers

BOR Universal Mufflers...

IN STOCK! Est Ship 3-5 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

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Description

Transverse Flow design. Transverse flow mufflers were originally designed for GM F-Body Camaros and Firebirds. On these vehicles they were mounted behind the rear axle and were parallel to the axle. This muffler can also be used to create custom systems on other vehicles. Single 2.5" Offset Inlet/ Dual 2.5" Offset Outlets. The inlet and one outlet are on one end of the muffler, and the second outlet is on the opposite end. Reversible design for installation flexibility. High-quality T-304 austenitic stainless steel for superior corrosion resistance. 100% welded construction for strength. Free Flow design for improved performance. High-temperature continuous-filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation. Best of all, it's made in the USA and backed by BORLA(r)'S Million-Mile warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Product Overview

Transverse Flow design. Transverse flow mufflers were originally designed for GM F-Body Camaros and Firebirds. On these vehicles they were mounted behind the rear axle and were parallel to the axle. This muffler can also be used to create custom systems on other vehicles. Single 2.5" Offset Inlet/ Dual 2.5" Offset Outlets. The inlet and one outlet are on one end of the muffler, and the second outlet is on the opposite end. Reversible design for installation flexibility. High-quality T-304 austenitic stainless steel will never rust. 100% welded construction for strength. Free Flow design for improved performance. High-temperature continuous-filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation. Best of all, it's made in the USA and backed by BORLA(r)'S Million-Mile warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Features and Benefits

Transverse flow design, originally designed for F-Body Camaro and Firebirds
Universal muffler. Reversible design.
Alternate muffler with Notched necks is 400498, use band clamp 18325
Un-Notched necks are designed for weld in installation. If clamping, use band clamps 18004.

Product Details

Body Height (in.):	5.5
Body Height:	5.500 in.
Body Length (in.):	19
Body Length:	19.000 in.
Body Width (in.):	10.25
Body Width:	10.250 in.
Construction:	All Welded
Description:	Universal Performance Mufflers
Grade Type:	Performance
Inlet Connection Type:	Pipe
Inlet Outside Diameter:	2.500 in.
Inlet Position:	Offset
Inlet Size (in.):	2.5
Inlet Type:	Single Offset
Main Piping Diameter:	2.500 in.
Material:	T-304 Stainless Steel
Muffler Count:	2
Off Road Use Only:	No
Outlet Outside Diameter:	2.500 in.
Outlet Position:	Dual Rear
Outlet Size (in.):	2.5
Outlet Type:	Dual Offset Outlet
Overall Length (in.):	24 (2 ft.)
Overall Length:	24.000 in.
Part Number:	bor40477
Position:	N/A
Prop 65 (C, R or CR):	CR
Prop 65 - Short Label:	Proposition 65 Warning.JPG
Prop 65 Yes/No:	Yes
Shape:	Oval
Tip / Outlet Finish:	N/A
Title Extended:	Specialty Muffler Transverse Flow 2.5 in. Single Inlet/ 2.5 in. Dual Outlet 5.5 in. x 10.25 in. Oval x 19 in. Long Body Part # 40477
Title:	Specialty Muffler Transverse Flow 2.5 in. Single Inlet/ 2.5 in. Dual Outlet 5.5 in. x 10.25 in. Oval x 19 in. Long Body

Application Summary

Specialty Muffler - Transverse Flow - Single 2.5" Offset Inlet/ Dual 2.5" Offset Outlets (One Outlet On Same End As Inlet And One Outlet On Opposite End) 6" x 10.25" Oval x 19" Long Body 24" Overall Length. Universal Part. Reversible Design.

Part Type

Exhaust Muffler

Data: v4.2 - Upd: 2026-10-13 23:17:15

Features

Alternate muffler with Notched necks is 400498, use band clamp 18325
Transverse flow design, originally designed for F-Body Camaro and Firebirds
Un-Notched necks are designed for weld in installation. If clamping, use band clamp 18004.
Universal muffler. Reversible design.

Specifications

Product Attributes - UPC: 808422404778
Product Attributes - Brand: Borla
Product Attributes - Quantity: Sold individually.
Product Attributes - Part Type: Mufflers
Product Attributes - Case Shape: Oval
Product Attributes - Reversible: Yes
Product Attributes - Outlet Style: Standard, without tip
Product Attributes - Product Line: Borla Performance Turbo XL Mufflers
Product Attributes - Inlet Location: Center
Product Attributes - Inlet Quantity: 1
Product Attributes - Muffler Finish: Brushed
Product Attributes - Outlet Location: Offset
Product Attributes - Outlet Quantity: 2
Product Attributes - Muffler Material: 304 stainless steel
Product Attributes - Inlet Diameter (in.): 2.50 in.
Product Attributes - Overall Length (in.): 24.00 in.
Product Attributes - Internal Construction: Turbo-style
Product Attributes - Outlet Diameter (in.): 2.50 in.
Product Attributes - Case Exterior Length (in.): 19.00 in.
Product Attributes - Manufacturer's Part Number: 40477
Product Attributes - Case Outside Diameter (in.): 5.50 in.

Reference Information

Brand Name/s	Borla
StreetFX SKU	bor40477
SFX Item ID	4224907
Supplier Item Code	4224907
Manufacturer SKU	40477
Manufacturer UPC	808422404778
Alternative References	2.5in, 19in, 10.25in, 5.5in