Driver`s side full bore exhaust manifold for the 2001-2006 Duramax balances your engine power, reduces cylinder load, reduces exhaust temperature, exhaust backpressure and improves fuel economy.
The stock manifold:
My first mod I think....
• Stock drivers side manifold only flows 75% of the passenger side manifold
• 3 cylinders only operate at 80% capacity & load others down
• No access to measure exhaust temperature
The BD manfilold:
• Flow matches the passenger side manifold and balances the engines exhaust pressure.
• Maintains consistent exhaust pressure and temperature on both sides of the engine. Contains Exhaust temperature probe port.
BD uses a high silicon Ductile iron that prevents cracking from heat expansion and vibrations. Manifold gaskets required.
Or it use to be really cheap...until Amsoil started sending us lists 3-4 times a month with inflated prices.
"the game of life of is not so much in holding a good hand as playing a poor hand well"
