i have a 99 prelude engine in my accord, and Im looking for a header for it. can any one of u tell me which is, arguably, the best header for the prelude in terms of power gaining throughout low - high range?


[Modified by After_Burner, 7:16 PM 2/2/2002]

 

i havent really kept up with the progress of the SMSP header, but i thought it was being developed for the 4th gen? so it wouldnt work on a 99 then would it?

 

smsp?? when did this brand come out? what r the specs on it?
do u think the 4th gen header would fit the 99? cause of the fact that its the same motor! more or les! hhehehe

 

4th gen headers definately dont fit the 5th gen's

peace

 

The prototype header won't "bolt up" to either the 4th or 5th gen stock exhaust. I'll be playing around with tube diameters, lengths and pairings and whatever tests well will dictate what the header looks like and where it terminates. If there is clearance in the engine compartment of both the 4th and 5th gen then the design should be able to be used for either. It really doesn't matter since the stock or any aftermarket B pipe will most likely require modification. The collector will most likely be 2-1/2" so that's the size exhaust that I'll probably recommend.

 

I want the full header cat and cat-back. I am willing to work with you on the prototype. IM me with you number so we can chat.

 

sorry dude, I didnt really understand what u were saying! :<..

 

SMSP: I just saw the dyno sheet in the ITR forum of your header against the spoon header. Very nice! The sooner you get this header done for the 4G the sooner I'll be writing out a check.

 

its just.. the header wont bolt up with the stock cat. so would i have to purchase an aftermarket cat like the Random Technology one or something? or are you developing that as well? i suppose a Greddy exhaust wouldnt work with this system either then?

 

is there a picture of this one particular header, they call SMSP or whatever its called? a website perhaps?? why is there not one for the the last generation of 97 and up?

 

its currently in progress..
none for 5th gen because it doesnt fit.


[Modified by illusion, 2:32 PM 2/3/2002]

 

I'm not positive what the difference between the 2 gens are since I haven't seen a 5th gen up close yet, but I'll assume most of it is in the B pipe attachment. This header won't be a bolt on for either generation. Yes you'll need a new cat, I build bolt in unit using Car Sound pieces.

 

ok. so definately, id need the SMSP header and cat if i were to go that route. will an aftermarket exhaust bolt up with those?

 

I don't know where the header will end and I'm not trying to get it to end at any particular point. The testing will dictate the design and therefore the overall length of the header. I'm about 99% sure that I won't use a flex tube but a ball & socket type joint, like the donut used on the JDM headers for the ITRs. Getting rid of the flex joint will free up some room between the header/cat and the B pipe, if it will be enough to make everything fit before the stock B pipe...I don't know. Any aftermarket cat back will have to be modified since the cat will have a 2-1/2" ID outlet and I don't know of any cat back systems that have a 2-1/2" ID inlet.

 

arent you makin a cat-back too. I want one of each but 3". can you do that??

 

would it be helpful to you to have access to a stock 98 exaust manifold??

 

Corey is supposed to be getting me a stock manifold. I can do 3", I'll assume it's FI, but doesn't someone already make one?

 

SMSP: I have a Stock 5th gen manifold and A-pipe from a Base model laying in my parent's basement. If you need to borrow it for a while for measurements, let me know. All I ask is that you pick up the shipping costs both ways. And yes, I'll need it back eventually...

This header is the same on all 5th gen Base models (5spd and auto). It will have a different A-Pipe length than the 5th gen TypeSH and the 4th gen...

Andrew

 

I have not seen a 4-1 and thats what I need. its gonna big built motot with atleast a 100 shot. my mechanic told me to ask if you would do 1 3/4 primaries with a 3 inch collector. Aren't you gonna do a cat-back also. I heard somethin about the a cat-back exiting out the side?

 

You'll need more than 1-3/4" primaries if you plan to run a 100 shot. The primaries for the NA header will probably be around 1-3/4". Drop me an email about this set up. I maybe able to get 4 tubes down in front of the engine.

The side exit deal was for Corey's race car, it will probably consist of a resonator and some 2-1/2" tubing out to the side in front of the RR tire. If I can make it work it may be set up to run either side of the car depending on where the sound meters are set up.

BTW, if anyone has a blown/trashed H22 or H23 short block that's only good for a boat anchor, like me know please.

 

I don't belive so, and Thermal wants a fortune to make a run of them. I'm in for one asap, and can supply oem a&b pipes if needed.

 

HKS?

 

Nope, I just checked. I may have a local place do it up, but I wanted to hear from you first. I have a good feeling that there would be a good amount of people in search of a somewhat bolt-up 3" system.

 

I thought I was told that HKS built, oh well. Yes, I can build you one. However, it would be made from multiple mandrel bends and then all tig welded. Shouldn't have a problem using a 6" diameter resonator in a 14", 18" or 30" long body in the tunnel. Then there are any number of mufflers that could be used at the rear.

 

so let me get this straight.....the header youre making will require a custom catalyst and exhaust? the greddy i plan on getting is 60/70mm piping. could i make that work? and is there an approx release date for it?