j3ffy
Full member
WHAT IS THE BEST EXHUAST & INDUCTION KIT RECOMENDED FOR MY MK5 ASTRA 16I CLUB HAVE JUST BOUGHT IT AND DONT HAVE A CLUE WHAT WORKS AND WHAT DOESN'T ANY HELP WELCOMED.......:embarrest:
Generally speaking you want a modest size (bore) exhaust to retain back-pressure. Look for something about 1.5" to 2" max ID imo. Anything too big could potentially lose you torque.
With regards to a filter, you are better off with a cold air inducton kit. IE an enclosed filter with a cold air feed running to it. If you just plonk a cone filter on your inlet you'll most likely just suck in hot air and lower performance on an NA engine.
Don't expect massive gains though.