GrimmSpeed Catted 3" Downpipe - WRX (08-14) / STI (08-Up)

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  • Regular price $570.00
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A downpipe is one of the first modifications that should be done on your car, as the OEM downpipe contains two very restrictive catalytic converters. Replacing these with our single high-flow unit will dramatically improve performance potential while maintaining the use of a catalytic converter. Within our complete lineup of downpipes, you have the option to add a high-flow, 300 cell catalytic converter, fully machined and contoured flanges and black ceramic coating. Whether you're racing time attack or to work and back, we've got the perfect downpipe for you.

  • Proudly made in the USA - Design, Materials and Fabrication
  • FARO™ Arm Designed - We are at the leading edge of new product design hardware
  • O2 Bungs for factory sensor and aftermarket wideband AFR
  • Divorced Wastegate for Optimal flow
  • High-flow, 300 cell, metallic substrate catalytic converter
  • GrimmSpeed Gaskets Included - A $40 Value!