any one know if there gonna make headers for the TL..

 

probably not.. because.. our ULEV will not be in effect anymore.. i doubt it'll pass emissions.

PLUS the "header" is casted into the head.... but you COULD prolly take out the 2 cats and put piping.. but then again.. ULEV will no longer be..

 

MugenR meant exhaust manifold is cast into the head, not "header". Very few cars come with headers from the factory. And MugenR is right.. the exhaust manifold IS cast into the head, so you cannot have headers on the TL.. it's just not possible unless you were to have a different set of heads.

I have to wonder why on earth Acura (Honda) would do this with this engine since headers are a fine way to get some more power out of an engine.

 

Thank you for correcting me SouthernBoy ... i couldn't think of the word.. so i jsut put "header" hahha thanks

 

Your comments are right on point. Why did Honda do this? It seems obvious to me that they didn't want people messing with the ULEV status of the engine. That may be why the stock exhaust system is pretty low restriction, the intake is very close to a CAI setup, and the exhaust manifolds are integral with the heads. They seem to have made the powertrain pretty "mod-proof". Whatever may be gained through any mods is either minimal or imagined. The Comtech supercharger, if it ever becomes a reality, is not included in the above reasoning.

 

IM A DEALER AND I JUST TALKED TO A TECH,AND HE SAID ITS FOR THE ULEV
AND YES NO ONE WILL NEVER MAKE HEADERS FOR OUR CARS DUE TO HEAD AND MANIFOLD IS ONE PIECE
ITS MORE HEAT CLOSER TO ENGINE TO BURN UP LEFT OVER FUEL
MDX IS SAME TOO,SO THAT MEANS RL IS SAME TOO

 

thanks for the replys guys... just lookin for a lil more power..

 

This is what I suspected. The first two cats bolt directly to the head where they can pick up the most heat to heat up the catylist and burn off any remaining unburned fuel. With headers, the exhaust gases would have more time (and distance) to cool a little before entering the cats.

A trade off for ULEV status. I would prefer headers. My '88 Mustang LX 302CID (that's 5.0 liter for you liter lovers), even with the bolt on mods, burned cleaner than my wife's 1991 Honda Accord LX.. 4 times cleaner! But the Ford EEC IV ECU was far better than Honda's ECU and the little 302 was a proven design, based on Chevy's small block. And my Mustang had both factory headers and JB "shorty" headers at varying times.

 

headers dont do anything for emissions - to echo SouthernBoy comments, I used to have a '90 Chevy truck with the 350 V8. I had headers, exhaust, intake, and the emissions were no higher than my mom's stock '97 Camry when I got it tested in Texas. And the same with my car now. Before and after my mods, my emissions tests havent changed at all.

To say Honda cast the damn manafolds into the heads for emission reasons is pushing it pretty far - it may do some, but not enough to make it like that vs having normal manafolds. Most of the emissions controls are in the cats and the O2 sensors, so as long as they are functioning correctly, you car will pass emissions w/o a problem (and they are not changed with aftermarket headers).

I can only imagine the HP gain the 3rd gen TL could have with aftermarket headers...oh well

 

No, the lack of headers doesn't do anything for emissions, but the important thing is to locate the cat. converters as close to the combustion chamber as possible to allow fast warm-up of the cats to reduce emissions. Thus, no separate exhaust manifold. Anyway, the TL has plenty of power, but it would be nice to have a little more torque and more evenly distributed throughout the rpm range.

 

not true. take the head off and run it through the bandsaw. a few taps and a header can be bolted up. not sure who would do this, but it's not terribly difficult to accomplish.

as for why, because there's really not much left to harvest from this motor. adding headers won't get you any significant gains unless one makes a boat load of other mods.

 

the honda team race tl at thunderhill ( i think ) chopped off the collectors and welded up new larger ones. there is a post about it from a while back on honda-tech. thats the most you could do.

to help with the memory, it was a multi colored/decal'd tl with a white aspec kit i think.

 

Umm, headers by themselves don't change the emissions status. They are just pipes and they will be moving the spent gases faster.

I have headers on my car (UA5) and my buddy ran emissions tests on it at his school (UTI). She came out clean as a virgin's honey pot. He said even the instructor was amazed as how clean my car ran -- he jokingly said that you could breathe in the exhaust gas and be okay.

 

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