aFe SCORCHER GT Power Module (77-43018) 4021 Aside from the catalytic converters

Aside from the catalytic converters

HPS black performance shortram air intake with heat shield [part number 827-690WB] for 2003-2004 Toyota 4Runner 4

Constructed of 3-1/2" into 3" mandrel-bent

please check muffler shape

aFe SCORCHER GT Power Module (77-43018) 4021 Aside from the catalytic convertersScorcher GT Module by aFe. HP Gain: Up To +51 HP. TQ Gain: Up To +60 TQ. A simple 30 minute install will give you a huge increase in power. The aFe POWER SCORCHER GT Module includes a high quality case & wire harness with factory style connectors for an easy plug & play installation. A LED light switch provides In Cabin On The Fly power adjustments. The 4 Power settings are adjustable with one button and the LED light represent the settings: Stock