Description: The REDS 521 Sport .21 Off-Road Competition Buggy Engine Combo with 2143 tuned pipe and S manifold, offers a balance of innovation, quality and performance at a mid range street price. The 521 Sport features technical changes in the 5 port sleeve, combined with updated materials to offer users high reliability, tuning stability and fuel mileage. The 521 Sport guarantees excellent performance at a reasonable price.
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