Assalamoalaikum. I have swapped my passo 2006 1000 cc engine with k3 1300cc engine but mechanic has installed same old catalytic converter(after some alteration) and exhaust which was installed with 1000 cc engine. He said it will work fine. So is it fine or may cause problems? My main concern is fuel economy
Wailaikum AssalamDid he changed the ecu and intake manifold?
Yes
What type of alternation he did. If cat and exhaust is fine then you can use it only if exhaust headers are of 1.3, because 1.0 and 1.3 have different headers.
Yes he has probably adjusted headers to fit the old exhaust and catalyst
Get exhaust changed as well, so you will have a complete setup.
AOADear how was ur experience with changing passo 1000 to 1300 cc, please share ur experience, thanks.