In the same passage we always quote:
Eph 2:8-10 : 8 For it is by grace you have been saved, through faith — and this not from yourselves, it is the gift of God— 9 not by works, so that no one can boast. 10 For we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do.
In the same thought, Paul says we are NOT saved by works, but that we were created to do good works. Presumably, we were not created to do works for pay, but rather works of love, which are NOT a causal part of salvation. Paul is only speaking to Christians here. The "we" and "us" relate back to the earlier "you".
"You have been saved" in Eph 2:8 is incorrect. Your own King James version says "are ye saved" and Young's literal make the progressive case very clear: "ye are having been saved". Secondly, St. Paul is not saying there that we are not saved by works in general, -- he qualifies these works twice, as works "form yourself" and intended to "boast". This is consistent with the Catholic teaching, with James 2, and St. Paul himself in Romans 2, and right here in Ephesians where he tells us that we are created to do good works. He also concludes his thought thus:
13 Wherefore I pray you not to faint at my tribulations for you, which is your glory. 14 For this cause I bow my knees to the Father of our Lord Jesus Christ, 15 Of whom all paternity in heaven and earth is named, 16 That he would grant you, according to the riches of his glory, to be strengthened by his Spirit with might unto the inward man, 17 That Christ may dwell by faith in your hearts; that being rooted and founded in charity, 18 You may be able to comprehend, with all the saints, what is the breadth, and length, and height, and depth: 19 To know also the charity of Christ, which surpasseth all knowledge, that you may be filled unto all the fulness of God. 20 Now to him who is able to do all things more abundantly than we desire or understand, according to the power that worketh in us; 21 To him be glory in the church, and in Christ Jesus unto all generations, world without end. Amen.(Eph 3)
Works and faith are not separated at all here: they are a single way of life that as a whole -- both faith and works -- has been in us as a result of Divine grace. Works strengthen faith and faith strengthens works, just like St. James teaches most conclusively.