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Does your 2004.5-2005 DURAMAX LLY act
sluggish
accelerating,
get poor fuel mileage,
easily overheat,
and the fan clutch run often?


EVERY 04.5-05 LLY HAS THIS ISSUE BECAUSE
THE TURBO INLET MOUTHPIECE IS DEFECTIVE!



If you have been discouraged (pissed-off might fit better) with your 2004.5-2005 LLY lack of performance… the exciting news is… the problem has been identified and can be easily fixed!

Daily LLY owners tell us daily how they have made expensive aftermarket modifications to their truck (chips, air intakes, exhaust) … with little results.

We constantly hear performance complaints about 04.5-05 LLY.

COMPLAINTS INCLUDE:
- Fan clutch constantly running
- Overheats pulling loads up grades
- Sluggish turbo response / throttle response slow
- Turbo failures
- Poor fuel economy

PROBLEM DISCOVERED
The main source of the LLY defect is the turbocharger inlet mouthpiece. The mouthpiece had been redesigned by GM to squeeze into a smaller space. This size reduction compromised the mouthpiece aerodynamically with a significant air restriction caused by SHARP RIDGE in the elbow which results in a "narrow throat” and poor airflow.
The Turbo Mouthpiece attaches to the inlet side of the turbo





NOTICE the sharp ridge in the throat?


The sharp ridge creates air flow resistance and turbulence!
This is a manufacture's design flaw!
The turbo inlet mouthpiece is made of a dense high-temp injection molded plastic. The design flaw was created by the injection mold leaving a sharp ridge at the elbow in the throat of the mouthpiece.
GM noticed this design flaw (but failed to mention it to LLY owners) and re-engineered the turbocharger mouthpiece to be larger and much less restrictive in the newer LBZ and LMM model years. In these newer models an increase in power and lower engine temps are all noticeably affected.


The enormous amount of airflow restriction caused by the sharp lip and the narrow “throat size” of the LLY mouthpiece forces the turbocharger compressor to work extra hard to deliver the air pressure and volume demanded by the ECM. Higher vane loads and lower max boost is the result.

A restricted air flow means the turbocharger needs to make more Boost to compensate for these losses. This means the compressor must work harder to create additional boost, spinning considerably faster to do it… that is a bad thing, not a good thing.
Eliminating air induction restrictions permit the turbo to work less to produce desired boost making it more efficient. The turbocharger becomes easier to drive which also increases longevity and reduces the amount of heat produced by the compressor. This means lower exhaust back pressure and lower EGT,

It does not matter what the air intake aftermarket manufacturers tell you their products do to reduce air restriction… they still don’t fix the LLY design flaw.
The constriction in the “throat” of the turbocharger inlet mouth piece must be eliminated for their products to work properly.

SIMPLE STOCK REPLACEMENT

The solution is simple and inexpensive
so don't live with the problem!
The "AFE" AFTERMARKET INLET MOUTHPIECE is a direct stock replacement that has a 70% LARGER THROAT which increases airflow and decreases turbo lag.






WITH A 70% "LARGER THROAT" AFTERMARKET MOUTHPIECE BY AFE YOU WILL:
  • Increased Air Flow "Volume" Which Means Better Turbo Efficiency
  • Reduced Fan Clutch Operation And Hi-Load Overheating
  • Higher Boost Numbers
  • Quicker Turbo Spool And Throttle Response
  • 200-400 Degree Reduction In Peak EGT
  • Installs In 30 Minutes With Clean OEM Appearance

INSTALLATION IS VERY SIMPLE:
The turbo inlet mouthpiece is connected directly to the front of the turbocharger inlet with a "band clamp". Remove the black plastic resonator (black piece that says 6.6 Turbo Diesel) and the PCV hose... then loosen the band clamp and replace the mouthpiece.
PLEASE NOTE: Just changing out the flawed Turbo Mouthpiece will allow your turbocharger to operate and build boost much smoother... BUT if you are looking for up to 20% fuel mileage gains you also need to add the DURAMILEAGE™ tuning.