Most non-supercharged cars are limited at 108. Most supercharged are limited at 128. It has nothing to do with engine, and everything to do with the tires shipped on the car from the factory.
Those of us who have been over 130 have aftermarket PCM'* that delete the top speed limit.
Fatty, your only option is DHP unless Jet has something for you. However, you'll hit your aerodynamic limit before 130 anyway. I'd have to calculate it, but I'd bet under 120 as your current limit.
For Series 1 L67 cars that can't achive the typical 128 limit, you have to back off and let it shift to the next gear at the top end. It won't shift at WOT.