Скачать или смотреть STOCK APPEARING 858 CATALYST HEAD MOD // Speedwerx USA

These new head designs for the 858 add a huge amount of power and performance! The chamber design is completely different from stock! We switch back to a true conventional dome shape chamber, change the squish band width and depth and the results are 5 HP gain on premium pump gas at sea level with out 12.75:1 domes and 8+ HP at higher elevations higher compression domes.

Available Compression Dome Ratio’s:
12.75:1 / 0-3000’ (91 Premium Pump Gas Non OXY)
13.25:1 / 3000’ + (91 Premium Pump Gas Non OXY)
13.75:1 / 4500’ + (91 Premium Pump Gas Non OXY)
14.25:1 / 6000’ + (91 Premium Pump Gas Non OXY)
14.75:1 / 9000’ + (91 Premium Pump Gas Non OXY)

🔗 https://speedwerx.com/stealth-head-mo...

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