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Borla Performance Industries was founded in 1978 and remains America's premium cat-back exhaust brand. Every Borla system is hand-built from T-304 austenitic stainless steel and backed by a million-mile warranty — the OE choice for Camaro ZL1, Mustang GT350, and Chevy Corvette.
Upgrade your exhaust system with the Borla ProXS Oval Muffler, featuring a 2.25-inch inlet/outlet configuration. This center-to-offset design is engineered for vehicles requiring specific routing to clear chassis components while maintaining maximum exhaust velocity. Borla’s commitment to quality ensures that this muffler provides a significant performance boost over restrictive factory units.
The ProXS series is the gold standard for enthusiasts who demand longevity and sound quality. Its T-304 stainless steel construction means you never have to worry about rust or corrosion, even in harsh climates. Whether you are upgrading a daily driver or a weekend track car, this muffler provides the reliability and performance gains you expect from a world-class brand. Experience the difference in throttle response and exhaust tone by choosing this premium component from GGCRACING.
| Brand | Borla |
|---|---|
| Manufacturer part number | 40658 |
| GGC SKU | BOR40658 |
| UPC / GTIN | 808422406581 |
Use the manufacturer part number when you compare with other listings or ask us to confirm a match.
| Box size | 19.7 × 10.2 × 5.3 in |
|---|---|
| Shipping weight | 7.5 lb |
Universal fit — check measurements. Compare the dimensions and specifications on this page with your application before you order.
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