Welcome to the official GReddy USA blog: For an Ultra Custom GReddy REVOLUTION RS UNIVERSAL MUFFLER 2.5" 3 BOLT 105MM TIP (11001126) GReddy Universal 2.5" RS Ti Oval Titanium Muffler With V Band GREDDY CATALOG RS TI GREDDY FRONT PIPE STAINLESS STEEL R32 34 GTR (10520603). 1x Revolution RS 51mm or 38mm Dia. Muffler Silencer for GReddy Revolution RS 105mm Tip *(also compatible with most (160mm dia.) GPP RS RACE & GPP RS Ti mufflers)Maintain straight through flow, with more muffler sound suppression.Tip Cup Dia.: 103mm (4.0")Silencer Pipe Dia.: 38mm (1.5")Pipe Length: 300mm (11.8")Material: 304 Stainless steelMounting pattern: Revolution RS Tri mounting *115mm available in Silencer Pipe Diameters 51mm or 43mm *105mm available in Silencer Pipe Diameters 51mm or 38mmFits most GReddy Revolution RS, GPP RS Race & GPP RS Ti 2.5" 140mm dia mufflers. Call to check compatibility with your application. (949) 588 8300Notes: Requires 3mm Allen Head driver and 8mm wrench socket to install** Not compatible with Universal Revolution RS with weld on tips.