Category Archives: Engine

RS4 Airbox

Took another step toward completing a transition over to a Bosch RS4 MAF sensor by acquiring an RS4 Airbox top.  The lower half of the RS4 and S4 airboxes are nearly identical with the RS4 airbox just having a port that opens to allow more air in.  The darintake modification, cutting openings in the lower half of the stock S4 airbox accomplishes the same function so that the only needed piece of the intake is the top half of the airbox that attaches to the 83mm RS4 MAF housing.

Another benefit to having the RS4 airbox on hand will be to flow test it versus the stock airbox.

Audi B5 RS4 Airbox and MAF
Audi B5 RS4 Airbox and RS4 MAF with Bosch Sensor

Engine Removal Checklist

This is a copy of the Excel file that I print out and then check steps off from as I proceed through when removing and then reinstalling the engine.

It’s not necessary to follow each step in the order given, but I have tried to group and sequence the steps so that movement about the car is reduced.

It may not be complete depending upon the hardware on your car, but it should probably be a 90% solution for most B5 S4’s.

Engine Pull Checklists