intake manifold

[travis_118]

Will a stock intake manifold off an si bolt straight on to a standard civic?

[NC_Rex]

D15B1 and D15B2 motors share the same head as the D16A6 Si motor. The intake manifold porting and bolt patterns are the same.

What is different is the wiring. Dual point injection is not compatible with multipoint.

Secondly the exhuast manifold on the 88-89 (and maybe later) Base model D15B1 Civic is an efficiency merge-style collector with close proximity catalytic converter....the same exhuast manifold used on the CRX HF models 88-91. Eats about 10~15 horsepower off the D15B1 engine...and the D15B1 is basically a D15B2 except for this and maybe a different ECU with different maps (D15B1 and D15B2 ECU's are swappable).