advice needed on what to buy for 1.3 ep91 sportif

[hondalifestyleuk]

My Son has a 1997 sportif ep91 1.3 4e-fe n/a wondering what we can do to improve performance but keeping it n/a, ie inlet manifold, exhaust manifold, cold air feed etc

car is lowered on tein springs 57mm fronts / 50mm rears and has 15" dotz alloys

[*Pete*]

Inlet manifold find a corolla tubular inlet manifold. Any filter will need a cold feed of air or theres no point in it. Exhaust, harder as OBX manifolds made for the 5efe are rare to come across. I think some 5efes have 4-2-1 standard but there still cast and hard to find. Also try and make the exhaust free flowing but don't go big diameter, I have 3 straight through Jetex silencers and the standard straight through resonator box. Look into ignition timing and adjusting it for what you want may give some good results. Bit more work on but bigger throttle body will have torque gains in the lower RPM's from my experience so far.

Could go down the root of finding all the first gen ecu and stuff to make it 100hp that some of the early jap models were. Go all out and get stand alone ecu, throttle bodies, tubular manifold etc.