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PPE 3UZ LS430 HEADERS 2001-06PPE Engineering is one of the longest running header suppliers for the Toyota/Lexus UZ V8 platform, and it's easy to see why! These headers are hand welded on a jig and nicely ported afterwards. These exhaust manifolds are made of 100% 304 stainless steel using a 4-1 design, and feature 1 5/8" runners with smooth formed collector and 2.5" outlet. Power gains are 18-20 whp and 20+ ft lbs!These headers are a direct fit to factory Catalytic Converters, no modifications required. These Headers are built to order, Current lead time is 6-8 weeks once order is placed.