They do fit fine.

Will LB7 up pipes fit LMM?

They are not the same. Go with out the bracket just make sure the exhaust lines up easily with the down pipe.

How much HP can a stock LML handle?

In stock form it can support 520-550 RWHP with the help of a lift pump. For 600HP you simply need more pump. The Exergy Stroker Cp4 or the ATS add a pump kit can both get you to your goal.

What does up pipe do on Duramax?

An aftermarket up pipe will assist in allowing your Duramax engine to breathe more efficiently l... eading to a drop in exhaust gas temperatures and a boost in horsepower and torque.

Are all Duramax blocks interchangeable?

Registered. nope not at all. you just have to change the reluctor wheel.

WCFAB Duramax Up Pipes Explained

23 related questions found

Can you bulletproof a LB7?

Unfortunately there is no way to bulletproof these injectors. Between the voltage going to them, and the fuel quality being so inconsistent, air, water, and debris the gets through the system, and how the truck is used all makes a huge difference in how long the injectors last... Plus what cores you get from reman set.

Are LB7 reliable?

Overall, the LB7 is a very reliable and efficient engine with exception to the injectors faults, but beyond that, the truck will only need basic maintenance and last for several hundred thousand miles.

How much HP will a downpipe add?

It's generally accepted that installing a downpipe will add just 10 to 20 horsepower, but that gain is noticeable when the engine is revved up.

Are downpipes worth it?

Downpipes are definitely worth it if you also do a dyno tune – it provides a boost in horsepower and makes your car sound more aggressive. However, if tuning is not done, horsepower gains are minimal – making downpipe not worth the money.

Does EGR delete increase horsepower Duramax?

The main benefit of removing the EGR system is that hot and sooty exhaust gasses will no longer be fed back into your intake, which has always been a problem when dealing with diesel engine longevity and efficiency. ... You can expect to see an increase of a few MPG and HP after blocking off or removing the EGR system.

Does my LML need a lift pump?

Either way, a lift pump is required to make anything over *500 RWHP with your LML. The reality is that the pump simply can't keep up without a lift pump if you want more power than that. ... Lift pumps are nothing new to diesel performance. Older Duramax models came equipped with a Cp3 high pressure fuel pump.

Can I put a 6 speed Allison in a LB7?

The Sun Coast Allison 5-6 Speed Conversion for your 2001-2004 GM 6.6L Duramax LB7 converts your 5-Speed Allison A1000 Transmission into a 6-Speed like the later models. With the conversion, you can drop 325 engine rpm @ 75 mph with 3.73 gears.

Do downpipes need a tune?

Does Downpipe Require Tuning? Downpipe does not require tuning to work. If you really don't want a tune or you can't afford it – you can install downpipe without a tune. ... Also, tuning your car after a downpipe install has more benefits than just the horsepower.

Why does downpipe increase horsepower?

Upgraded downpipes provide great increases in horsepower and torque on turbocharged vehicles by allowing exhaust gasses to flow easier as they leave the turbo.

Do you need a tune for a downpipe GTI?

A downpipe on a MK7 without a tune WILL 100% make the car run lean. Due to the physical decrease in restriction post turbocharger the car will absolutely react different ad become quicker and more responsive.

Are downpipes legal?

A "Downpipe" is a pipe with no catalytic converter. Missing a cat in California is illegal. A "Downpipe" is a pipe with no catalytic converter. Missing a cat in California is illegal.

Does downpipe make car louder?

Aftermarket downpipe definitely makes a car louder and sound more aggressive. This is because aftermarket downpipes are louder than stock and they reduce the backpressure in exhaust. Allowing sound waves to travel smoothly without collision.

Is a downpipe bad for your car?

Even though they are in small amounts, the cost of these metals can add significant costs to the downpipe. ... Aside from not making any additional power over a high flow catted downpipe, a catless downpipe is bad for the environment and can also be bad for you, your community, and your engine.

Are LB7 fast?

It has thousands and thousands in extras. Motor work it is a very fast truck the lb7 is the fastest motor of all the duramax motors.

Do all LB7 have injector issues?

Yes, the injectors were a issue in the LB7 and yes there are plently of LB7's running around that have never had injector issues. The injectors carry a hefty price if done by a GM dealer if that issue ever arises. I wouldn't go out and sell my truck just because of the thought of the injectors going bad.

Is the LB7 the best Duramax?

The LB7 is the original Duramax engine that arrived in 2001. It's still highly popular in the used market. ... The lack of these extra emissions parts made the engines highly reliable. Modern Duramax engines often have issues with emissions devices, which don't typically last very long.

What are the bad years for Duramax?

Duramax Problems by Year

• LB7: 2001 – 2004. As the original Duramax model, the LB7 is still extremely popular with diesel enthusiasts due to its lack of emissions control parts. ...
• LBZ: 2006 – 2007. ...
• LMM: 2007.5 – 2010. ...
• LML: 2011 – 2016. ...
• L5P: 2017 To Present.

Does 2004 LB7 have EGR?

My '04 LB7 has no Cat or EGR.

How often do LB7 injectors go out?

The biggest issue with '01-to-'04 and 1/2 LB7 engines is their fuel injectors' propensity to fail, typically before an engine reaches 100,000 miles. When an LB7 injector fails, it can dump an enormous amount of excess fuel into the engine, often at very low speeds (such as idle, for example).