The TS500 model was specifically designed with weight and space savings in mind. An end on view will show that the TS500 design will provide more header and frame clearance for applications where space is a premium. Lastly, Meziere offers the TST400 solution for Big Block and Small Block Chevy engines that utilize a 139 tooth "ten pitch" flexplate.
NOTE: If using the model TST400/500, it is mandatory to use Flexplate PN: FPT300. Both "ten pitch" components must be used together. Model TST500 is the Slimline version of the TS400.