With a championship winning heritage in the 2-stroke days, Bills Pipes sought to transfer that same knowledge to build a high performing and long lasting exhaust system for the 4-stroke motocross market
The SA-4 offers just that: performance, durability, and a sleek look
Hand-crafted and built in the USA in Corona, California, the SA-4 exhaust system is deeply rooted in the mecca of the motocross industry
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