I'm redoing the exhaust on my 94 corolla (1.6L 4AFE for what it's worth) with stainless headers and a stainless catback system. All the stock sections are severely rusted together, so they will have to be cut apart for removal. The outlet pipe on most headers available for that car are 1.75". The inlet and outlet for new catalytic converters is around 2 inches. The piping for just about all the catback systems for that car is 2.5". These parts are supposed to be "direct bolt on", so I assume that the flanges will bolt up fine. I'm just concerned that the sections increasing in diameter without adapters could upset flow. I've never messed with exhaust, could someone shed some light on this for me?
If you're stepping up like you are it shouldn't be a problem. Occasionally the way the air flows will create a problem but i'm sure this system has been checked out in that capacity.
Green Type RS BILLET Turbo Blow off Valve BOV + 2.5" FLANGE PIPE TUBE ADAPTER, 45MM STAINLESS STEEL BLOW OFF VALVE BOV FLANGE PIPE ADAPTOR, NEW 2.5INCH 2.5 SSQV SQV BOV TUBE BLOW OFF VALVE TUBE PIPE FLANGE HKS ADAPTER , 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo ACURA INTEGRA RSX NSX TL, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo VW RABBIT PASSAT GTI GLI, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo VW GOLF JETTA VR6 1.8T, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo VIPER NEON SRT4 RAM, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo SUBARU WRX STI LEGACY, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo Toyota Supra Celica Mr2, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo S13 S14 240SX 300ZX GT-R, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo SCION TC XB XA OUTBACK, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo MAZDA MIATA RX-7 8 MX-6, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo LEXUS IS 250 300 350 GS, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo Infiniti G35 G37 350Z , 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo HONDA CIVC PRELUDE CRX , 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo FORD MUSTANG PROBE FOCUS, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo ECLIPSE EVO LANCER 8 9 X, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo BMW 1 3 5 SERIES M3 MINI, 50MM Blow Off Valve BOV Adaptor Flange Pipe 2.5" Turbo AUDI A4 A3 S4 S6 TT TTS, 2.5" TURBO CHARGER BLOW OFF VALVE BOV ADAPTER FLANGE PIPPING PIPE, T3 2.5"X2" /0.5" 4-BOLT MILD STEEL TURBO/TURBOCHARGER/DOWN PIPE ADAPTOR FLANGE, 2.5 TYPE RS S ADAPTER BLOW OFF VALVE BOV FLANGE PIPE, 2.5" TYPE RS S SSQV TURBO BLOW OFF VALVE ADAPTOR BOV FLANGE PIPE, 2.5" TYPE-S/RS BLOW OFF VALVE BOV FLANGE PIPE ADAPTER, Greddy Blow Off Valve BOV Adaptor Flange Pipe 3" MAZDA MIATA RX-7 8 MX-6 MAZDA 6, Greddy Blow Off Valve BOV Adaptor Flange Pipe 3" Infiniti G35 G37 350Z 370Z, Greddy Blow Off Valve BOV Adaptor Flange Pipe 3" AUDI A4 A3 S4 S6 TT TTS, Greddy Blow Off Valve BOV Adaptor Flange Pipe 3" ACURA INTEGRA RSX NSX TSX TL RL, Greddy Blow Off Valve BOV Adaptor Flange Pipe 3" LEXUS IS 250 300 350 SC GS , Greddy Blow Off Valve BOV Adaptor Flange Pipe 3" VW GOLF JETTA R32 VR6 CORRADO,
