Improve exhaust balance and support a higher-flow dual-exhaust system with Firebird and Trans Am X-pipe components from Hawks Motorsports. This category includes crossover assemblies, tunnel-mounted X-pipes, X-change components and related exhaust parts for custom Pontiac F-body builds.

An X-pipe joins the left and right sides of a dual-exhaust system in an X-shaped crossover. This connection allows exhaust pulses to share available flow capacity between both sides of the system, which can improve scavenging and produce a smoother, higher-pitched exhaust tone compared with many traditional H-pipe configurations.