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Engine builder Clay Witt has been working at TPIS almost as long as the shop has been open. He's assembled countless performance engines from mild vintage engines for cool hot rods to full-race Chevy V-8s for IMSA Trans-Am competition. He's been working with the LS family of GM V-8s as long as they have been available, and knows all the tricks to make them both powerful and durable for the long haul. Witt is seen here holding TPIS's own single-plane EFI intake for the LS, which TPIS intends to use on their Challenge engine.