1991 EX f22A4 tube header for a 1992 EX F22a6

[Old Dog 61]

I have a 1992 EX that I am getting ready to put a 1991 EX tube exhaust manifold on my car. I know It will bolt up to the head of my motor but will it also bolt up to the stock pipe going back to my catalytic converter thanks in advance for your input. Be well.

[Bravo-man]

Yup!

[cuate01221]

Yup!

I thought the header was a one piece unit and the manifold was a 2 piece unit? or the other way around lol

[Tippey764]

Is there anything wrong with your a6 manifold? If not i wouldn't waste your time with an a4 manifold swap

[cuate01221]

Is there anything wrong with your a6 manifold? If not i wouldn't waste your time with an a4 manifold swap

This. Save up for a bisimoto header

[Old Dog 61]

Yeah...I'd love to have a bisimoto header but for now the A4 tube exhaust manifold will do. The manifold only cost $20.00 and I'm good with that and besides the car is a daily driver.

[cuate01221]

If it's a daily driver and you are looking for performance, the A4 manifold will give you a complete 1 whp gain. If you are going for looks, buy a DC header

[Tippey764]

Yeah...I'd love to have a bisimoto header but for now the A4 tube exhaust manifold will do. The manifold only cost $20.00 and I'm good with that and besides the car is a daily driver.

But its not going to be any worthwhile boost in preformance

Yeah sure the exhaust manifold is $20 right?

Do you have gaskets as well? New bolts incase any break?

All im saying is its a waste of time and could create problems if there is nothing wrong with the one you have.

[deevergote]

There probably won't be a performance gain, as the A6 manifold actually flows quite well, even though it is a cast piece. The A4 header is tubular, which is nice... and it MIGHT provide a very minor gain. It will look better, though.

Generally, people seem to refer to the cast pieces as "manifold", and the tubular ones as "header".
MOST "headers" for our cars are 2 piece.

[Old Dog 61]

I'm not expecting any great HP gains from the A4 design. From my reading and searching here, I have read that the A4 manifold flows well and is suggested as an option and that it MIGHT offer gains over other factory choices. I have read that the A6 manifold flows well also. The A4 I believe will flow only as good as My A6 manifold and will look better AND be a factory part.
I'm doing this along with a intake manifold swap I just have a few more parts to buy. The Intake is a H23 TB and plenum on A6 intake runners, I have a Bisimoto heat shielding intake gasket to install it with. I also double stacked the IAB's plates and they WILL BE functional. I searched all of this on this site and followed all the DIY's to do this.
This will be my first modifications to a Honda.... It's a daily driver BUT I do want more from it. I'm an old man learning new tricks and HAVING FUN

[deevergote]

You should enjoy the H23/A6 setup with the Bisimoto gasket. I'm glad to see you're keeping the IAB functional... so many people just bypass it, and it bugs me!

[Old Dog 61]

Thank you for that Deev, I mean they ARE factory and they put IAB's in for a reason and it works. I had the intake bead blasted when the exhaust was blasted as well so both are clean.
I am looking forward to the intake swap. All I have read say it is a good combo.
I have also bought all the necessary hoses and O-rings to do preventive maintenance on the back of the motor. O-ring for the oil cooler, hoses for the oil cooler, O-rings for the pipe going from the water pump to the thermostat housing and heater hoses. I'm going to remove and replace the intake as one assembly. Since I am there already after I pull the intake off, do the PM work from above instead of underneath OH yeah... all the hoses and O-rings are Honda
I mean to keep this car a LONG time.