ckperformance is now manufacturing its version of the 9/11 called the 10/12.the size is the same as the others but it has been renamed so theres no confusion and also because it is a 10"x12" piece.as of right now we are not building the billet versions but will be shortly.what we have done though is made the non billet cover design once again available as it was discontinued by tcs.we will build the billet version as soon as our stock of tcs billet cover pieces are depleted from stock.we will continue to honor any issues with the tcs 9/11 convertor for the duration of their warrantee period.the non billet gives those guys who dont need a billet cover the cost savings over the billet piece without any sacrifice in stall speed or performance.various configurations were tested and led us to the final designs.they are available in 2800,3000,3200,and 3400rpm stall.also one should note that we will be making our selections based on engine torque,and turbo size which makes mechanical sense when selecting proper stall.ie,a motor making 500ftlbs of torque that must leave at 3600 will get the 3200 part number.this is because all ratings are based on 400ftlbs and 15lbs bost.this system will be much more end user friendly and will help eliminate downtime due to restalling.anyone interested can contact me personally as we will be giving a great deal on them this month,thanks .