I have a Brand New, never used JapSpeed RB20/RB25 bellmouth downpipe for sale would be a great upgrade for your Stock RB,
$220.00 + SHIPPING
Paypal add 2.9% +.30 USD
This Combined Stainless Steel Downpipe & Elbow Replaces the Standard Downpipe and the restrictive cast iron Turbo Elbow which significantly Improves Exhaust Gas Flow Increasing Turbo Spool Up & Reduces Turbo Lag
T304 Polished Stainless Steel, CNC Mandrel-Bent Tubing
3" Bore Right Through
CNC Machined Flanges for Strong Solid Support & Accurate Fit
TIG Welded for Strength & Durability