WRX / STI Spark Plug List
Spark Plug Gap – .024-.028 More Boost = Less Gap 100HP Over Stock = 1 Step Colder Plugs 2002-2005 Subaru […]
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EVO 8/9/X Spark Plug List
Spark Plug Gap Stock Coils – .020-.024 Coil On Plug – .022-.026 More Boost = Less Gap 100HP Over Stock […]