This is a long tube 4 to 2 to 1  header for the gd3. This replaces the stock header as well as the stock cat and bolts up to the midpipe/B pipe. 1.375" primaries with 1.625" secondaries and 2" outlet.
***international shipping available. contact me directly for an accurate price with shipping*** 
These are made to order and lead times vary widely depending on my current order volume