You can squeeze the tunnel narrower to make more room by cutting a small section of the tunnel out in the top middle at the firewall. I cut out an inch of mine. The process is in the assembly manual. I have a Tremec TKX. The Gen 2 interior is 3 inches wider than the Gen 1. The brake and clutch pedals are also adjustable side to side about a 1/2" left or right from center. You install the accelerator pedal after the tunnel is installed so you can position it where you want the position to be. You remove it to get the tunnel out so you know where it will be and reinstall it during finalizing the interior. I'm 6 feet tall and wear 11 1/2 shoes. The pedals are a little tight but very manageable. They say to put the gas pedal about 3/4" away from the tunnel but that's with the sound proofing, insulation and carpet installed so take that into account. There is a indentation in the tunnel in the gas pedal area which helps.