E55 MODDING QUESTIONS (RENNTECH)
2. IS ECU/PULLEY/CARBON AIR BOX
3. ECU/PULLEY/HEADERS
OR WOULD YOU DO STAGE 2 AND GET OTHER CUSTOM HEADERS ... WILL THAT IT HAVE ANY EFFECT ON THE ECU UPGRADE TO HAVE DIFFERENT HEADERS THAN RENNTECH?!
AND SHOULD I GET RENNTECH I/C PUMP AND HEAT EXCHANGER UPGRADE?!
OR THE NEW 2010 BOSCH PUMP IS ENOUGH!?!...
2. IS ECU/PULLEY/CARBON AIR BOX
3. ECU/PULLEY/HEADERS
OR WOULD YOU DO STAGE 2 AND GET OTHER CUSTOM HEADERS ... WILL THAT IT HAVE ANY EFFECT ON THE ECU UPGRADE TO HAVE DIFFERENT HEADERS THAN RENNTECH?!
AND SHOULD I GET RENNTECH I/C PUMP AND HEAT EXCHANGER UPGRADE?!
OR THE NEW 2010 BOSCH PUMP IS ENOUGH!?!...

I have one FS), custom tune, Floored fab LT headers and cooling mods. Less money and same or better performace



