Headers and Y-Pipe Questions
05-26-2005, 09:08 PM
#41
Originally Posted by NmexMAX
Puppet's a 
but so am I ....
Cliff notes :
All 02+ Maximas are CALI spec, and that would require the relocation of 2 O2 sensors, or the use of a simulator. If FED spec, only one needs relocation.
Other options include ...
Y-pipe, so so gains on 3.5L, good gains in 3.0L.
Covert to fed spec (has been done before), but getting headers is probably a better option since you're doing essentially the same thing, but with pre-fabbed components.
Hot Shot( readily available) need some custom work. BlackBIRD had done it as well as a few other members.
Cattman (backorder now)
All 3.0's running in good shape(No CEL,SES etc) will pass emissions with a y-pipe as long as the vehicle is fully warmed up. I'm not sure if this holds true with headers, but see no reason why they shouldn't being that 3.0 FED y-pipes eliminate all pre-cats and only leave one cat in place ( the main one) and the headers do the same, so as long as the main cat stays, you fully warm up car before testing, and you have no CEL's or a SES light, you're good to go. Somebody
me if I missed something ..
but so am I .... Cliff notes :
All 02+ Maximas are CALI spec, and that would require the relocation of 2 O2 sensors, or the use of a simulator. If FED spec, only one needs relocation.
Other options include ...
Y-pipe, so so gains on 3.5L, good gains in 3.0L.
Covert to fed spec (has been done before), but getting headers is probably a better option since you're doing essentially the same thing, but with pre-fabbed components.
Hot Shot( readily available) need some custom work. BlackBIRD had done it as well as a few other members.
Cattman (backorder now)
All 3.0's running in good shape(No CEL,SES etc) will pass emissions with a y-pipe as long as the vehicle is fully warmed up. I'm not sure if this holds true with headers, but see no reason why they shouldn't being that 3.0 FED y-pipes eliminate all pre-cats and only leave one cat in place ( the main one) and the headers do the same, so as long as the main cat stays, you fully warm up car before testing, and you have no CEL's or a SES light, you're good to go. Somebody
me if I missed something ..Nice restatement of a lot of what I said... so
to what Nmexmax said, since I said some of it too.... Btw, if ya already have a y-pipe, the FED spec conversion seems like a cheap way to add a bit more HP, instead of spending the money to get headers. It really depends on what you're after.
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