was wondering if any of you guys know if the b16a2 header and the b18c1 header for the civic si and gsr are the same....I was wondering because skunk2 sells a header for the acure integra gsr but not for the b16 and i thought they were the same...... maybe i smoked to much before i wrote this.....hahaha

 

the 00-01 gsr headers are about the same length and should bolt right on. the 94-99 ones are somewhat shorter. hth.

 

the gsr header will fit on the b16 but... the b16 header will not fit the gsr due to the block.

 

Yeah the B16a header will not clear the oil pan on a 1.8L motor because the 1.8L engine has a taller block, thus a taller header.

The GS-R header will hang too low on a B16a engine IMO and it will still be too short because the Integra GS-R for some reason used a shorter A pipe piece on it's stock exhaust manifold and a longer exhaust B pipe.

Summary?

Find a header made for the B16A if you can, or an Integra Type R or LS, but not GS-R.

Any 1.8L header will hang lower, but a lot of people don't let that stop them from running the JDM 4-1 style headers since they are most always made for the 1.8L engines as opposed to the 1.6L motor.

Any 4-1 will require some sort of exhaust mods since it has a 2.5'' collector. Usually a muffler shop will need to add the 2.5'' flange and donut gasket.

 

its only the downpipes that are different lengths