Replacing HS Header with OEM

[StreetDreamin]

I have a 1990 240sx (sohc KA24e). Currently I have a HotShot header on it, but it's too loud so I ordered an oem exhaust manifold from midway parts. But looking at the oem part and the HS header, the oem manifold will not reach to the cat converter. Did I order the wrong part or are there more parts necessary? Thanks in advance.

[NISTECH]

it may matter weather your car is califonia emissions or federal emissions, I know this plays a part on some of the nissan products, Do you have any pictures of your exhuast and your new parts?

[nelson8708]

My buddy had the same problem with the exhaust being too loud. There is a simple 20 dollar fix. We went to meijer and bought a cherry bomb muffler even though it looks more like a resingnator. We welded it in abought a foot after the catalytic converter. It cut the exhaust noise level in half.

[StreetDreamin]

I'll try to get some pix up in the next day or so. I don't have a garage and its been sprinkling over here.

[StreetDreamin]

I think i need a lower exhaust manifold?? I dont even know if thats a real part. But I got some pics of my situation. Hope it helps.My new oem e manifold:

Here's a zoomed out pic of my header:

Here's one zoomed in:

[NISTECH]

well it looks like you original exhuast has been cut off and a new flange has been added where the header attaches to the exhust pipe. Snap a shot uner the car where the header bolts up. I am betting a large chunk of your exhuast has been cut off.

The manifold is the correct one though.

[StreetDreamin]

What is a nem flange? Sorry, I don't have access to a lift. The exhaust flow is from the hotshot header, then into a high-flow cat and 2.5 in brm exhaust provided by Greg. So what does this mean in terms of if i want to go back and use the stock manifold?

[NISTECH]

*new*

It sounds as if the header pipe[pipe between factory manifold and cat] has been removed, that is at least what else you'll need to put the exhaust manifold back on.

[StreetDreamin]

Thanks. I was confused (n00bness) and thought a header was the exact same thing as the exhaust manifold. So I guess I need the header and the gaskets that connect it to the e manifold and cat? What else can there be? I have these diagrams from Dan Tech, but not sure if i need any of those other smaller pieces. Do i just need the 20010 piece? Thanks for all your help man.

[NISTECH]

every thing in the red circle is what you'll need, unless you have an automatic transmission then you'll need everything in the box at the upper left

[StreetDreamin]

I have a manual. What is a nem flange? and can you name all those parts for knowledge sake? Thanks soooo much NISTECH!

[NISTECH]

20010= header pipe.20511=upper header pipe heat shield20510=lower header pipe heat shield20511m=header flenge shield20712=header to cat gasket20671=upper and lower heat shield clamp.the part numbered ones like 08915-5381a are the actual factory part numbers and are all bolts to attach the sheilds.

"new flange" not "nem flange" sorry.