The Borla transverse-flow universal muffler uses a single 2.5in offset inlet with dual 2.5in offset outlets, where the inlet and one outlet are on one end of the oval body and the second outlet exits the opposite end. This transverse-flow design was originally developed for GM F-body Camaro and Firebird applications mounted behind the rear axle, and can also be used to build custom systems on other vehicles. Un-notched necks are designed for weld-in installation; if clamping, band clamps are used (clamps not included). It is built from T-304 austenitic stainless steel with 100 percent welded construction and a reversible body for installation flexibility. It is handmade in the USA and backed by Borla's Million-Mile warranty.
Specifications:
- System type: Universal weld-in transverse-flow muffler
- Inlet: single 2.5in offset
- Outlets: dual 2.5in offset
- Body: 19in x 10.25in x 5.5in oval
- Material: T-304 austenitic stainless steel
- Construction: 100 percent welded, reversible design
- Acoustic packing: continuous-filament fiber (CFF)
- Made in the USA
- Part number: 40477
FAQ
Is this a universal muffler?
Yes. This is a universal weld-in muffler component with a reversible body for installation flexibility. It uses a transverse-flow layout originally designed for GM F-body Camaro and Firebird and suits custom builds needing a single inlet and dual outlets.
Is this muffler emissions legal for street use?
As a universal weld-in muffler component, emissions and street legality depend on the complete exhaust system and the vehicle and state where it is installed. It carries no standalone emissions certification.
How is it installed?
Un-notched necks are designed for weld-in installation. If clamping, use band clamp 18004 (clamps not included). The reversible design adds installation flexibility.
What is it made of and where is it made?
The muffler is handmade in the USA from T-304 austenitic stainless steel with 100 percent welded construction and is backed by Borla's Million-Mile warranty.
