Cummins ISC 8.3L Exhaust Manifold Kit, Dual Port Turbo, 3937477, 3943841

This manifold carries a 2 year warranty
Turbo flange dimensions:Bolt center to center width distance - 3.37"  
Bolt center to center depth distance - 1.75"
Kit includes the following components:
1 qty Exhaust Manifold Assembly  2-Port Front Section 3937477, 3943850 (Suitable replacement for part number 3937478) 4-Port Rear Section 3943841
1 qty Exhaust Hardware Kit 6 qty Exhaust Manifold Gasket # 5269779 (Replaces 3937479) 12 qty Exhaust Manifold Bolts # 3944593 (Replaces 3901448) 12 qty Exhaust Manifold Spacers # 3945252
If you are ordering this component without looking up part numbers - Please pay particular attention to the location of the Turbo Manifold Flange on your existing manifold. You may find that your turbo mounts in the middle of the four ports on the large section. If that is the case, this manifold will not work for you. The turbo mounting flange on our manifold is very offset to one side, as shown in the photo. It is not centered between the four ports. If you are unsure if this is the correct manifold for your application, please give us a call with your Engine Serial Number and we'd be happy to assist. 
Please note:You may also need to replace the following components, which are sold separately (see below): 1 qty Turbo Mounting Gasket # 3901356 4 qty Turbocharger Mounting Stud & Nut Kit # 3801888 (Stud # 3818823 & Nut # 3818824)
Over time exhaust manifolds warp and develop cracks, leading to exhaust leaks and possibly exhaust fumes migrating into the operators cabin. This is why we manufacture our manifolds out of top quality cast iron. Our exhaust manifolds are designed to flow more efficiently, delivering better engine performance.
replaces 181043