Click to expand Tap to zoom Traxxas 5425 - Header, Exhaust (Revo Big Block Kit) by Traxxas Out of Stock $31.95 SKU TRX5425 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Out of Stock - Please ask us to order it for you. Traxxas 5425 - Header, Exhaust (Revo Big Block Kit)Brand: TraxxasPart Number: 5425Replacement or upgrade part for these Traxxas models: