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The JDM Spec C "big port" cylinder heads are widely regarded as the best performing OEM cylinder head case made by Subaru thanks to its enlarged port design which yields significant increases in gas flow when compared to the UK/Euro EJ207 equivalent part
Larger volume with inlet diameters of 78mm to 88mm (stock is 63mm)
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Ramair Universal Foam Pod Air Filter - 65mm Carburettor Fitment clearance10 The JDM Spec C "bigFor motorcycles we have a series of 'pod' style air filters designed to clamp onto the engine air intake(s). These allow maximum air flow at all times. Comes with clip for attachment. All of our foam pod filters come with a lifetime single user guarantee against manufacturing defects. Image is for illustration, you are purchasing a single filter with the specified dimensions. We have spent years designing the optimum intake induction filter kits for
