A new client dropped off his 01 Viper GTS and asked us to make a few changes to his car so I decided to quantify a few mods he wanted performed. After removing the unwanted components, the Viper made 436.5rwhp and 482rwtq with smooth tubes and filters, B&B cat-back with off-road pipes, Fidanza flywheel, NGk plugs and MSD wires. We then installed our clients underdrive pulley/belt and made 442.6rwhp and 482.8rwtq. Then we installed T&D 1.7 roller rockers and made 457.88rwhp and 485.3rwtq. We're in the middle of installing Belanger headers, but it's getting late and we'll finish up in the morning. All of the pulls were made @ 190 indicated degrees of coolant temp and we'll do the same when the headers are installed tomorrow. I'll post our findings once the headers are installed. If anyone would like to post this information, feel free to contact us and I'll fax the sheet.