Hey,
Looking for some cheap ways to give my 400 some more power.
Any ideas? Want cheap stuff and do not want to bore.
Any advice helps. Do air filters make more power?
Tyler

 

If your machine has a carburettor, there is a long thread on here about how to tune the Eiger which will apply to your 400 KQ. If it is an injection 400 I guess you are in for re-mapping and tuning chips. Changing the filter and exhaust without a re-map will result in less power as the standard ECU is set for the standard filter and exhaust.

 

no such thing as cheap and free HP.

 

Okay I will try it merry. Thank you.