The AFE 48-34009-PK Twisted Steel Up-Pipes & Exhaust Manifolds enhance performance, and flow in your 2001-2004 GM 6.6L Duramax. This combo kit includes AFE's Twisted Steel Up-Pipes and BladeRunner Exhaust Manifolds. Replace the old, cracked, or leaking up-pipes and eliminate the pinch in the factory exhaust manifold with this all-in-one kit.
These unique up pipes are constructed of 2" mandrel-bent 304 stainless steel tubing with a .120" wall for strength and durability.
2" Inner Liner Flex Pipes:
The down-pipes utilizes heavy duty 2" flex tubes with internal inner liner.
High quality 3/8" thick flanges are used for a complete 360 degree sealing surface.
These manifolds have both the inlet and the outlet ports machined to match the factory gaskets. This allows for maximum flow, without compromising gasket performance.
An Exhaust Gas Temperature (EGT) probe port is incorporated into each manifold for easy installation of gauges or testing equipment. There are three additional cast in bosses provided to allow for alternate testing points.
These manifolds are compatible with the stock up-pipes, which allows the manifolds to be installed without having to remove the turbocharger down-pipe or the up-pipes.
- Durable, Ductile Cast Iron Manifolds
- Outflows Factory Exhaust Manifolds By 6%
- Pre-Drilled & Tapped 1/8" NPT Ports In Manifold
- Eliminates Restricting Pinch Of Factory Driver-Side Manifold