Monster Motorworks 4-2-1 Stainless Header Pics.
We have finished one of our SS headers, here are some pics.
Next week we will have 2 more done.
This one is already sold..
These will be up for sale, first come first served.
Next week we will also have a DYNO DAY at our location in South San Francisco.
Dyno Day August 27th.
180 Sylvester St, SSF Ca 94080.
There we will dyno our intake and Header for all to see.
Everyone is invited.



Next week we will have 2 more done.
This one is already sold..
These will be up for sale, first come first served.
Next week we will also have a DYNO DAY at our location in South San Francisco.
Dyno Day August 27th.
180 Sylvester St, SSF Ca 94080.
There we will dyno our intake and Header for all to see.
Everyone is invited.



It does include the S-Pipe.
4-1 Headers are simple to make, usually thought to have best exhaust flow.
But it is not the case, You want the cylinders to breathe in sync and flow easily.
4-2-1 the exhaust flows out of the 2 cylinders and then merge into a collector and then into another collector.
Smooth flow means faster exit.
The way we design the headers we have to take into consideration.
1. Engine size.
2. When the VVTi comes in on the power band.
3. Maximum NA Potential of the engine.
4. Engine Stroke and firing order.
5. Pipe size for each part of the header.
6. Where to make a Flex joint for front wheel drive cars.
7. Fittment.
8. Powerband ( low mid or high end power only )
9. Tubing Length.
10. Collector sizes.
We really put alot of time into our headers and will do anything to protect our designs.
If you want to see the results of the Dyno on this header come to our Dyno Day.
4-1 Headers are simple to make, usually thought to have best exhaust flow.
But it is not the case, You want the cylinders to breathe in sync and flow easily.
4-2-1 the exhaust flows out of the 2 cylinders and then merge into a collector and then into another collector.
Smooth flow means faster exit.
The way we design the headers we have to take into consideration.
1. Engine size.
2. When the VVTi comes in on the power band.
3. Maximum NA Potential of the engine.
4. Engine Stroke and firing order.
5. Pipe size for each part of the header.
6. Where to make a Flex joint for front wheel drive cars.
7. Fittment.
8. Powerband ( low mid or high end power only )
9. Tubing Length.
10. Collector sizes.
We really put alot of time into our headers and will do anything to protect our designs.
If you want to see the results of the Dyno on this header come to our Dyno Day.
Originally Posted by GammaTNT
can someone explain to me what is the difference between a 4-1 and 4-2-1 header?
With a 4-2-1 design, supposedly you get power gains throughout the entire power band (read: throughout entire range of acceleration), whereas with a 4-1 design, you get more power, but only in the higher end (I believe above 4000 RPMs on the tc engine, dpeending on what header youa re talking about). I say "supposedly" because I have not seen dyno sheets that confirm this, I'm going just by what I have been told.
Clearly, if that is all true, then a 4-2-1 design would be much better. Even if it were to make less overall power, if it is available at lower RPM's, and last throughout the entire range, it would be more beneficial than having to wait for the engine to rev up to take advantage of more power, and then keep the engine in the usable powerband.
Originally Posted by PghtC
looks nice. I suppose no one will ever make an emissions legal header. Damn.
as long as it isn't throwing a CEL, and the cat from the midpipe isn't removed, this shouldn't be illegal at all.
Damn MMW.. that was quick!!!
ok.. now for the $850.... if anyones is interested... im selling a slightly used left arm... right ********... and three toes from my left foot...!! for $750.. i could probably save my right nut!
ok.. now for the $850.... if anyones is interested... im selling a slightly used left arm... right ********... and three toes from my left foot...!! for $750.. i could probably save my right nut!
Originally Posted by monstermotorworks
We will not sell our S-Pipe, because it only fits our Header,
it was designed to work in conjuntion with our Race Header only.
You will be able to buy the header at the dynoday.
it was designed to work in conjuntion with our Race Header only.
You will be able to buy the header at the dynoday.





