Rep Power: 260

I have an 01 EX, OBX header and an exhaust running from the flange just behind the cat. i am pretty sure the downpipe and header will fit, i have not looked into that in a long time.

1) do you think i need to get a downpipe, or is it not worth the trouble and effort?
2)and what about the sensors, do you really need them for the car to run properly??!?!???

 
Rep Power: 267

unless you have a turbo, prolly not

 
Rep Power: 0

i dont think anything is really "necessary" on our cars, it's just if we're willing to waste money to make a slow car stay slow

 
Rep Power: 453

1. No I dont think you need to get a downpipe because it really wont give you any gain in power. Also the stock downpipe has the cat converter in it so you need to find another one with a cat converter in it (part of it) (random tech has on).

2. Yes the 2 o2 sensors are necessary. the front o2 sensor measures the 02 coming out of the engine and based on that will send a signal to the ECM which will lean out or richen up the fuel mixture. the secondary o2 sensor monitors the cat converter and will signal the ECM if it isnt working correctly. Both will turn on the check engine light if not there.

 
Rep Power: 296

i don't have the 2nd o2 sensor connected have the check engine light..but everythings running just fine (aside from tranny, but thats another thread) i've had it for at least a year.

if you sell your stock downpipe...lemme know how much, im trying to go back to stock and can't find mine.

 
Rep Power: 361

wow you are posting up a storm posbos04. search a bit.

 
Rep Power: 262

u will definately need one as im finding out now. if u dont have an EX u'll need it to convert to EX Exhaust setup... but correct me if i wrong raren't there different types of downpipes ppl (i.e. different lenghts and # of bungs)