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Diamond Diesel Service, Inc., Auto Repair & Service - Diesel, Oakland, CA

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Back To Performance Products> GM-Duramax

Diamond Diesel Service, Inc. will only sell and recommend Performance Products which comply with the Original Equipment Manufacturer's (O.E.M) Standards. There are many so called "Performance Products" on the market that improve performance by altering the amount of fuel and air to the engine which have the potential of damaging your engine or Fuel Injection System. We do not recommend these products.  We do recommend specific Performance Products because these products either improve engine performance without altering the Fuel Injection System or monitor the Engine to insure that the Diesel Fuel Injection System is operating correctly.

Why are we qualified to recommend Performance Products?

1) Diamond Diesel is an Authorized Service Dealer for the Fuel Injection System on your vehicle and we can't and would not recommend anything that might void your warranty with the O.E.M. Providing service for Fuel Injection systems is what we have been doing for a living since 1965.  We represent manufacturers such as Bosch, Zexel, Stanadyne, Delphi who monitor our employee training and equipment to insure that we have the latest and greatest in Diesel Fuel Injection technology.

2) We are a member of the Association of Diesel Specialist (A.D.S.).  A.D.S. members are known throughout the industry for the high technical standards they maintain. Uniform repair standards, the Nationwide Warranty program, and the  A.D.S. Master Pump Kit represent a commitment to reliable, high-quality service.  We voluntarily comply with the A.D.S. standards and will not recommend any product that might cause problems with your engine.

Why purchase these products from us?

1)Because all Performance Products interact with your fuel injection system in one way or the other.  If you have any problems with your fuel injection system we can help you troubleshoot and isolate the problem, unlike your your average parts house. We have Master Trained Technicians who do nothing else but repair these Fuel Injection Pumps all day long. 

2)We have been in business since 1965 and have a 800 technical support phone number if you have any questions.

 
GM DURAMAX DIESEL AIR INTAKE SYSTEMS

Several non-OEM air intake systems are available that improve the performance of your engine without voiding the Manufacturer Warranty.  They improve the engine performance because the air intake system replaces the more restrictive factory box and paper filters and lets your engine breathe better. The air intake system benefits are especially noticeable at higher elevations when the engine is starved for air. These systems require an up front investment to purchase them but because the filters are washable and re-useable, in theory, the investment will eventually pay for itself.

The benefits can include

(amount varies with engine type and intake type):

AIR FLOW IMPROVEMENT

HORSE POWER GAIN

IMPROVED FOOT POUND OF TORQUE

INCREASED FUEL EFFICIENCY

GM DURAMAX 2001-2004 STAGE 1 INTAKE SYSTEM

Intake kits from aFe give your vehicle the air it needs by replacing the restrictive factory intake system with a high flow conical air filter, and providing isolation from the hot engine air. There are two types of magnum FORCE intake kits available for 2001 to 2004 Duramax: Stage One, and Stage Two. Stage One kits replace the factory air box with a housing and conical filter assembly, and may include a heat shield. Stage Two kits replace the entire intake tract all the way back to the Turbo or intake manifold, providing the ultimate level of fresh, clean, cool air to boost your performance.
GM DURAMAX 2001-2004 STAGE 2 INTAKE SYSTEM

Intake kits from aFe give your vehicle the air it needs by replacing the restrictive factory intake system with a high flow conical air filter, and providing isolation from the hot engine air. There are two types of magnum FORCE intake kits available for 2001 to 2004 Duramax: Stage One, and Stage Two. Stage One kits replace the factory air box with a housing and conical filter assembly, and may include a heat shield. Stage Two kits replace the entire intake tract all the way back to the Turbo or intake manifold, providing the ultimate level of fresh, clean, cool air to boost your performance.
 
GM DURAMAX 2004.5 STAGE 1 INTAKE SYSTEM

Intake kits from aFe give your vehicle the air it needs by replacing the restrictive factory intake system with a high flow conical air filter, and providing isolation from the hot engine air. There are two types of magnum FORCE intake kits available for 2001 to 2004 Duramax (LLY): Stage One, and Stage Two. Stage One kits replace the factory air box with a housing and conical filter assembly, and may include a heat shield. Stage Two kits replace the entire intake tract all the way back to the Turbo or intake manifold, providing the ultimate level of fresh, clean, cool air to boost your performance.
 
GM DURAMAX 2004.5 (LLY) STAGE 2 INTAKE SYSTEM


Intake kits from aFe give your vehicle the air it needs by replacing the restrictive factory intake system with a high flow conical air filter, and providing isolation from the hot engine air. There are two types of magnum FORCE intake kits available for 2001 to 2004 Duramax (LLY): Stage One, and Stage Two. Stage One kits replace the factory air box with a housing and conical filter assembly, and may include a heat shield. Stage Two kits replace the entire intake tract all the way back to the Turbo or intake manifold, providing the ultimate level of fresh, clean, cool air to boost your performance.
 
GM DURAMAX DIESEL EXHAUST SYSTEMS
GM DURAMAX EXHAUST SYSTEMS


Diesel engines need plenty of air to produce power and proper emissions. When you are pulling up a hill or accelerating, a high flow exhaust is critical for good engine performance. The DuraMax engine is a high speed diesel that needs to breath. Increasing the exhaust to a 4" mandrel bent system with a high flow muffler improves the turbo response. On the original 6.5 engine installation, the turbo down pipe is attached and results in a crushed pipe. On the original 6.5 exhaust, there are flow restrictions at the turbo outlet pipe and in the muffler. The rest of the pipe is usually only a 2.75" diameter. Our 3" and 4" full mandrel bent aluminized pipe corrects the problem. Giving the engine what it needs, improved turbo response and high airflow ability. High flow air filters are recommended to complete these performance kits.
 
GM DURAMAX DIESEL EXHAUST BRAKES

Since diesel engines lack a throttle valve on the intake manifold there is no intake vacuum when the engine is not fueling.  The intake vacuum creates the slowing effect felt in gasoline engines when they are going down a hill with the foot off of the gas, otherwise known as slowing using engine compression.

Exhaust brakes operate by closing off the exhaust path from the engine, causing the exhaust gasses to be compressed in the exhaust manifold and in the cylinder.  Since the exhaust is being compressed and there is no fuel being applied the backpressure provides the retarding horsepower to slow down the vehicle on even the steepest descents or just slowing down for a highway off ramp.   Exhaust brakes can extend the life of your service brakes by as much as 5 times.  More advanced exhaust brakes have exhaust pressure modulation (EPM) that controls the back pressure which in turn improves the braking performance across a range of engine speeds. 

GM DURAMAX EXHAUST BRAKES

Exhaust Engine Brakes enable your Diesel to navigate downhill grades and mountainous terrain easier and safer than using the vehicle's conventional braking system. This will increase the life of the stock foundation brakes and also prevent brake fade under severe grade driving. The factory-approved backpressure provides the retarding horsepower to slow down the vehicle on even the steepest descents or just slowing down for a highway off ramp.
The exhaust flow is not restricted when the stainless butterfly is open in the large 4" casting that bolts into the exhaust system. The kit is complete with a lighted toggle switch for mounting conveniently on the dash. The brake releases as soon as the throttle is applied or the switch is flipped off and of course the backpressure is self-regulating. Once the pressure reaches the DuraMax specification, the butterfly position changes to maintain the highest pressure possible. This variable orifice design offers far superior retarding performance throughout the engine RPM range compared to a fixed orifice design that only offers peak retarding performance at peak rpm. The new Allison equipped DuraMax is designed to downshift once the tow/haul button is selected, which results in a Silent Retarding Force at all vehicle speeds. Designed for the 6.6 Duramax, including the LLY engine for 04 and newer trucks.
 

GM DURAMAX DIESEL

MONITORING DEVICES & ACCESSORIES

GM DURAMAX TEMPERATURE/EXHAUST & TURBO BOOST MONITOR

What good is all this new power if you can't monitor it? Enter the X Monitor...
Its readout mounts inside a nice module that is positioned on the driver's side A-pillar. Seen are all three functions at the same time: transmission temperature, exhaust temperature and turbo boost pressure. All three have limits, and these numbers are downloaded into the X Monitor. When any are met or exceeded, the monitor face flashes a warning that can't be missed.

Benefits of installing the XMonitor:
. Operating pressures & temperatures can easily be read with a simple glance.
. The display brightness can be set for driver comfort.
. The peak operating levels can be set to flash warning for safety.
. The low mount does not restrict vision.

Peak levels are saved in memory and can be viewed after a run. The exhaust temperatures are monitored with a Pyrometer probe inserted in the exhaust flow. The probe can be mounted before of after the turbocharger. If mounted after the turbo the temperatures will vary from 300 F to 1000 F. If mounted before the turbo temperatures of 300 F to 1200 F will be normal working levels. Select the temperatures that should not be exceeded and the numbers will flash when it is attained. It is hard to have too much turbocharger boost pressure but if you have too little under a hard pull the result can be high operating temperatures. Transmission oil temperatures will reflect how hard you are working the transmission. The oil begins to break down quickly once it reaches 270 F. Higher temperatures cause transmission life to shorten, set the limit at the 250 F and increase the operating life. We can also monitor the fuel transfer pump pressure on the ISB electronic engines. Traditional round Analog gauges and mounts are also available; please scroll the page down to view them. Stay on top of what is happening in your engine with the proper gauges from BD! A Pyrometer to monitor exhaust temperatures. The Turbo Boost gauge keeps track of a turbo pressures. A Back Pressure gauge monitors exhaust brake performance. An Oil Temperature gauge will insure that you are aware of how well your transmission is functioning. A variety of mounts are available.
 
GM DURAMAX GAUGES & HOLDERS

The new line of Isspro analog gauges have a nice rounded face with good back ground lighting. You can easily monitor exhaust temperature, boost pressure and transmission temperature. Pillar mounts that hold 1 or 3 gauges are available and can be painted to match the brown dash color.
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