BMW 1 Series (E81/E82/E87/E88) 135i panel filter Panel Filter:Panel Filter These are a direct replacement

These are a direct replacement for the standard rear discs

This discharge can be heard as a distinct ‘dump valve’ hissing sound as it vents to atmosphere or back into the intake depending on the application and ECU airflow regulation

this is also MOT safe product

the new Hyper-Gate45 features a unique locking collar design for reduced size and quicker spring changes

The main reason for uprating an intercooler is to reduce the charged intake temperature as this is directly related to engine power

BMW 1 Series (E81/E82/E87/E88) 135i panel filter Panel Filter:Panel Filter These are a direct replacementPanel type Unique Panel Dimensions 231mmX205mm