When I was looking for a high efficiency air intake for my 2006 LS2 and wanted to keep the changes minimal, I bought this KN 63-3052 air intake. Installed in 45 minutes, no hitches, great fit and finish. Due to the conservative performance increase of 10.5 hp. I didn't have wild expectations. The change in sound under acceleration is fairly modest, perhaps harsher, but I was surprised when the tires blew out mid-first gear. The mids were definitely stronger, and I'm sure the highs were too. I'll wait and see if the mileage increases, but it's not surprising if it does significantly. More expensive than Wararam but in warmer climates I have no problem with reduced engine cooling. I am still a fan of KN products.
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