Most of us use the gates kit. You will find problems with any thing if you look hard enough.
I used a Gates kit on my new short block.
The first time I used a Dayco belt and pulleys I got from Advance Auto Parts. It's all good.
miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
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