Well, like the topic says.. Where is the 02 sensor located on the Dynomax headers for our cars? down at the collector, or up near the top like the manifolds? If it's located in the collector, would I need a heated sensor? Thoughts on this.. Oh BTW, I want to go with the Dynomax headers because 1. I have a Dynomax Catback, and 2. I don't plan on any major engine mods... But would I loose low end torque? If so How much.. Thanks

 

Are you talking shorties or long tube? Either way, the O2 sensor goes in the collector, and AFAIK, only shorties come with them from the manufacturer.

You will not lose low end torque unless you go excessively large on the primaries, and nobody makes headers that will fit our cars that have excessively large primaries. Any size you pick (and Dynomax only has one size) will show improvements over the stock manifolds.

There is absolutely no reason to stick with Dynomax just because you have their cat back system. A header that comes with y-pipe will meet the cat in the same place, so the only possible reason things would change is if you got one made for TPI which has a different cat size and connection. Any system made for the LO3 would not be as free flowing as a TPI system, but if you don't plan major mods, you should be okay with anybody's header/y-pipe made for the LO3.

 

Thanks.. DO you think a heated O2 sensor would be needed? or would a standard one still get enough heat down there?

 

I have used the Dynomax headers on my 89 with the 305 and now with the 350. Had no problems with the installation. The only problem is contact of the right header with the a/c. A little denting would solve the problem.
Jim