JS Muffler Shop & More JS Muffler Shop & More also does vehicle repairs on Electrical Systems and feature these products: Shocks, Cooling Systems, Starters, Fuel Systems, Struts. They are located in Shawnee. JS Muffler Shop & More They have not yet been reviewed on MojoPages.com. They can be reached by calling (405) 275-5756 They accept Visa. for payment.