2004.5-2005 GM 6.6L Duramax LLY S&B intake elbow 78.6% Improvement Over Stock!
2004-2005 VIN '2' LLY Duramax intake is restrictive factory plastic air horn. It connects directly to the factory turbocharger. You can see 3-4 PSI of pressure drop across the factory restrictive elbow. This pressure drop translates to about 10 psi of boost pressure under load. Works with factory LLY style intake and aftermarket LLY style intakes.