RSD Twinscroll 3.0" Stainless Steel 02-21 JDM WRX STI Downpipe, Group N Style divided Inlet

Upgrade your JDM WRX STI with the RSD twinscroll turbo 3.0" downpipe! 

• Reduce turbo backpressure and increase spool!
• Group N Rally style Divided flange with the wastegate gases merged in at the best angle.
• True 3.0" stainless steel tubing
• 2x factory position O2 sensor bosses
• Optional Highflow cat
• Optional OEM doughnut gasket adaptor available to mate upto to OEM and some aftermarket catbacks. ADAPTOR DOES NOT MOVE EXHAUST BACKWARDS!
• Get a clearer exhaust note, you wont regret how this will make your STI sound.
• Upto 20KW gain from bolting this downpipe on!
  

Remove your tired old OEM downpipe and opt for the 100% stainless steel RSD Twinscroll downpipe that will not rust or corrode. With superior fitment that allows for a clean and seamless install, the RSD Twinscroll downpipe is the only option if you want to keep your STI driving for years to come.

Available in multiple options to suit your specific model. If in doubt please send us an email at rallysportdesign@gmail.com or dm us on our socials and we will help you choose the correct option.

At this current time, for the RSD Twinscroll Dowpipe, we require ALL customers outside of New Zealand to email or message us before hand to discuss shipping due to the high cost associated with a large item such as this.

We also carry brand new OEM Spec C upgraded gaskets and new hardware!