Buy a used lid for $50, air filter doesn't matter, Loudmouth is overrated so any cat-back will make good power, ram air isn't needed either. No way I would spend that money on that combo. For that money, get some LPP stainless longtube headers and a lid and a tune. You'll make a lot more power than the SLP combo.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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