I get a lot of questions about what the best intake is, how big should I go for the TB, or how can I get such and such power. I will be putting together these write ups for all aspects of modding the engine. I will be quoting only OEM MB part numbers as there are a lot of interchangable parts available.

I will start with Induction and move onto fueling and exhaust. These are the three most moddable areas and the ones where the most HP can be gained with the least amount of money.

As I research more OEM parts I will update the write ups.

Enjoy!

INDUCTION

The Crossfire was plagued from the very beginning by poor induction. A small Airbox with 2.5” intake tubes was the best Chrysler could get away with as to not step on the MB owners’ toes. Once air is ingested through those “straws” it must squeeze its way through a 2.5” MAF, with 2 screens mind you, past a nice 3” elbow, unfortunately with some obstructive fins, and then finally through a 68mm TB, about 2.5”.

The stock system is limited by its smallest opening, in this instance it is 2.5”. Our goal is to open the intake up to 3” all the way through to allow more air and thus more HP potential. The following are a list of OEM MB parts that are bolt on and will result in a 3” overall size for the intake parts.

• C240/C320 Airbox: PN: A1120901501; this increases overall filter area by approximately 50%, Airbox volume by 35%, and increases intake tubes to 3”, a 20% increase from stock

• M113 MAF: PN: A1130940048; The V8 MAF is a full 3” design that allows for increased flow. Not only is it just a larger housing, but the MAF is tuned to run at the larger volume and thus will compensate correctly for the additional airflow. There are inherent issues with putting a non-collaborated MAF in a larger volume, this eliminates that.

• M113 Throttle Body: PN: A1131410125; The larger V8 TB is opened up to 74 mm and matches the inlet of the intake manifold perfectly. The engine will need to adjust to the new TB when first installed and a learning period of about 3-5 mins is necessary. Simply turn the key to the second position and let the TB calibrate itself.