Beeware of the 4 door civics, they are all 11 second cars!!!
All right, enought of that bullshit. Ask your friend what engine he has, here is a list of what people usually have
D15B2 (stock DX/LX engine)
SOHC (Single Overhead Cam) ZC
DOHC (Dual Overhead Cam) ZC
D16A6 (Si Engine)
D16Y8 (96-00 Civic EX engine)
B16A
B18A (Integra LS Engine)
B18C1 (Integra GS-R Engine)
B18C5 (Integra Type-R Engine)
And I am sure theres some more, feel free to correct my mistakes on this