If no one minds me adding my two cents worth. A 400HP engine is just that 400Hp requardless of transmission. Where the type of transmission comes into play is at the rear wheels. A manual transmission will reduce 400HP to around 350-357 HP. An automatic tranny will reduce 400HP to around 338-347 HP. But take heart. STS Turbo has a twin turbo system that replaces the mufflers with two turbos. They have them for LT1 LS1 engines. They took a C-6 corvette with 350 RWHP put their kit on it and booted RWHP by 39% with 5PSI of boost and boosted RWHP by 59% with 7PSI boost. That's 136 - 203 HP gain. We're talking 486-553HP at the rear wheels. Plus testimonials all have said they increased MPG by 4. Kick A** and save gas. Yes Virginia there is a Santa Claus.
