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How much extra kW PERFORMANCE HIGH RATIO ROLLER ROCKERS HOLDEN VS VU VT VX VY ECOTEC L67 SC 3.8 V6 will supply to a stock ecotech just has 2.5" exhaust and bt1 chip and ported Plenum?
Posted by on 26 May 2018 11:38 AM
You would be looking at power gains of around 10-13rwkw with the mods you have.

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