Pro Series Single-Turbo Header Build Kits: Cummins ISB 5.9L 12v

This twin turbo header build kit has everything you need to bring those 12v Cummins twin turbo headers together. See why Stainless Headers Mfg., Inc has the most complete header builder kit on the market.

We offer 3 stages of kit combination options:

Stage 1: The Base Kit

• 6) J Mandrel Bends (Available in 1 5/8" or 1 3/4" primary tube size)
• 2) 180 Degree Mandrel Bends (Available in 1 5/8" or 1 3/4" primary tube size)
• 1) 5.9L 12v Cummins Sq. Port Header Flange
• 6) Precision formed header flange stubs (Available in 1 5/8" or 1 3/4" primary tube size)
  
• 2) 3-1 Collectors. We have our standard weld-on formed collectors, or optional slip-on merge collectors. Details below.
  
• (2) 3 into 1 weld-on formed collectors (2 1/2" secondaries available only)
• (2) Performance 3 into 1 Slip-on Merge Collectors. Available as double-slip inlets and with v-band secondaries in the Stage III kit.
  
• 3)Sets of Collector Tabs
• 7) Purge Caps
• 2) O2 Bungs
• 1) 1/4 LB Tig Filler Rod
• 2) T-3 or T-4 or T-6 Flanges with Elbows

Stage 2: Includes everything you see in Stage 1, plus:

• 2) V Band flange welded on a tight 90 degree mandrel bend
• 

Stage 3: Includes everything you see in Stage 1 & Stage 2, plus:

• Double Slip Merge Collectors w/ V-band collector secondaries, size determined by turbo flange requirement.