August , 2026

Every Borla spec sheet lists the same line: T-304 stainless steel. It's easy to read past it as boilerplate. It isn't. The specific grade of stainless steel a system is built from determines how it survives thousands of heat cycles and years of vibration, long before sound level or pipe diameter enter the picture. Here's what "T-304" actually means, and why it's the grade Borla builds every system from.

Chevrolet has confirmed a fundamental architecture change to the Silverado 1500, and it's not the styling. Arriving late 2026, the next-generation Silverado retires the 5.3L and 6.2L Gen V small-blocks that have anchored Borla's Silverado lineup since 2019, replacing them with two ground-up V8s: a 5.7L and a 6.6L. If you're tracking what an exhaust upgrade looks like for a 2027 truck, here's the confirmed spec sheet so far, and the engineering question it raises for everything downstream of the manifold. For fitment on the current 2019-2026 generation, see the Silverado 1500 Buying Guide.

When Christopher Polvoorde straps into the cab of his Mason Motorsports All-Wheel Drive Trophy Truck, he needs to think. Race pace, terrain changes, team communications over the radio: the last thing a professional driver needs is relentless exhaust drone eating away at his concentration mile after mile.

But when that truck clears a jump or comes screaming through spectator zones, it needs to sound exactly like what it is: a high-output racing machine built without compromise.