MHP Long Tube Question
#1
MHP Long Tube Question
I know there are some here that have seen excellent gains wuth he MHP long tubes. I currently have K2 package. I believe that the results on this forum have all been with long tubes and cat delete. Is it worth making the change if I want to retain cats (versus my current K2)? How much are the MHP long tubes with cats?
Thanks
Thanks
#6
Nice qrtr mile times. Those headers work. But, I wonder if I would get significant difference if I installed with cats versus K2. Maybe better off installing the Kleeman throttle bodies. Wish there was more data on the throttle bodies. Maybe I will need to become a data point.
#7
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2013 Chevy 427 Torch Red
The MHP long tubes feature three sections, the midpipe is interchangeable with high flow cats. I don't know what the power difference is (with vs without the cats) but my catless system picked up 44 whp and 32 tq versus the K2, same dyno next day. Keith had similiar gains as well. TB's seem to be a question mark at the moment at least until some data comes available.
The catless version is loud when accelerating but not unreasonable. At WOT on the track it howls like a Banshee and really ups the ante on the intimidation factor.![naughty](https://mbworld.org/forums/images/smilies/naughty.gif)
![naughty](https://mbworld.org/forums/images/smilies/naughty.gif)
The catless version is loud when accelerating but not unreasonable. At WOT on the track it howls like a Banshee and really ups the ante on the intimidation factor.
![naughty](https://mbworld.org/forums/images/smilies/naughty.gif)
![naughty](https://mbworld.org/forums/images/smilies/naughty.gif)
![](http://i50.tinypic.com/16m13j8.jpg)
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#9
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2013 Chevy 427 Torch Red
Stock was 368 whp taken in Jan. Current is 458 taken in July( 95 degrees and 70% humidity). I will dyno again on a cold dry day because I don't believe the software really makes enough adjustment. Waiting for track results with the right weather and some drag radials.
#10
The MHP long tubes feature three sections, the midpipe is interchangeable with high flow cats. I don't know what the power difference is (with vs without the cats) but my catless system picked up 44 whp and 32 tq versus the K2, same dyno next day. Keith had similiar gains as well. TB's seem to be a question mark at the moment at least until some data comes available.
The catless version is loud when accelerating but not unreasonable. At WOT on the track it howls like a Banshee and really ups the ante on the intimidation factor.![naughty](https://mbworld.org/forums/images/smilies/naughty.gif)
![naughty](https://mbworld.org/forums/images/smilies/naughty.gif)
![](http://i50.tinypic.com/16m13j8.jpg)
The catless version is loud when accelerating but not unreasonable. At WOT on the track it howls like a Banshee and really ups the ante on the intimidation factor.
![naughty](https://mbworld.org/forums/images/smilies/naughty.gif)
![naughty](https://mbworld.org/forums/images/smilies/naughty.gif)
![](http://i50.tinypic.com/16m13j8.jpg)
#12
Doesn't the MHP tune remove the CEL light for the headers??
I want to use the MHP headers with my renntech tune, will I get a CEL light? Or is there a stop to plug the sensors back into the exhaust??
#13
Hello Merc63 and Everyone Else..
I wanted to let you know that I just became a sponsor of this site and are a fully authorized distributor for MHP products.
List Price on the LTH is $5,495 but the Holiday special is $4,495 plus $500 for Cats. You will also need to have a header file MHP or whomever you purchased your ECU tune through.
I will be posting the holiday specials later tonight so please stay tuned!
PM me if you have any questions...
Thanks,
Jim
I wanted to let you know that I just became a sponsor of this site and are a fully authorized distributor for MHP products.
List Price on the LTH is $5,495 but the Holiday special is $4,495 plus $500 for Cats. You will also need to have a header file MHP or whomever you purchased your ECU tune through.
I will be posting the holiday specials later tonight so please stay tuned!
PM me if you have any questions...
Thanks,
Jim
Do the exhaust sensors mate back up with the MHP LT headers? I'd assume the CEL would be a check cat code because of the emissions readings..?
Is it possible for them to delete that code on my ECU if I were to purchase the headers and still use my renntech tune?
#14
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Im sure renntech can remove the CEL warning if you need, but how much gains did you even get with them? MHP gets like 65whp with their tune and I would imagine 50+ more with headers.
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ones too fast according to CHP!
I know there are some here that have seen excellent gains wuth he MHP long tubes. I currently have K2 package. I believe that the results on this forum have all been with long tubes and cat delete. Is it worth making the change if I want to retain cats (versus my current K2)? How much are the MHP long tubes with cats?
Thanks
Thanks
If you don't delete them you will prohibit the increased gas velocity from the LT's from getting out, which creates back pressure, which minimizes the gains!
thanks
Brad
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ones too fast according to CHP!
There is no high flow cat made that will give you the same flow and HP as you would get from the LT's without cats. This is just fact, it is not about what vendor is offering it. Anyone that tells you otherwise is trying to "sell" you something rather than "tune" your car to meet your goals.
That being said, the addition of a cat (the properly matched high flow metallic substrate cat) can be a benefit in some set-ups. What they will do is to re-shape the curve and generally add more TQ at the expense of HP. The curve will move "down" or to the left if that makes sense. On low TQ cars (such as BMW M cars) this can be advantageous. On torque monsters like the AMG cars though, it is generally not of any real benefit.
This is JUST a discussion about HP, not about the benefits or legality of cats.
thanks
Brad
That being said, the addition of a cat (the properly matched high flow metallic substrate cat) can be a benefit in some set-ups. What they will do is to re-shape the curve and generally add more TQ at the expense of HP. The curve will move "down" or to the left if that makes sense. On low TQ cars (such as BMW M cars) this can be advantageous. On torque monsters like the AMG cars though, it is generally not of any real benefit.
This is JUST a discussion about HP, not about the benefits or legality of cats.
thanks
Brad
#19
No X-pipe? Really? Interesting...
Also, I worked at evosport for a good while there, and we had to make the headers with individual flanges to be able to install them without any cutting or removing any pieces other than the forward bottom shroud. How do these go in and what has to be removed or cut? Not a hater question, just interested in the process.
Thanks,
Josh
Also, I worked at evosport for a good while there, and we had to make the headers with individual flanges to be able to install them without any cutting or removing any pieces other than the forward bottom shroud. How do these go in and what has to be removed or cut? Not a hater question, just interested in the process.
Thanks,
Josh
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2014 Audi RS7
Josh,
The X-pipe goes after these pipes in place of the resonator because the stock cross over is in the resonator. I should have taken pictures before I installed the cat back, sorry.
The only parts you need to remove are the normal plastic undercarriage guards and the steering box/shaft. Otherwise they take less than literally 5 minutes to install after those parts are removed. Macedo Motorsports did the install and Larry said they were one of the best fitting and highest quality headers he had ever installed. The performance is incredible!!
The X-pipe goes after these pipes in place of the resonator because the stock cross over is in the resonator. I should have taken pictures before I installed the cat back, sorry.
The only parts you need to remove are the normal plastic undercarriage guards and the steering box/shaft. Otherwise they take less than literally 5 minutes to install after those parts are removed. Macedo Motorsports did the install and Larry said they were one of the best fitting and highest quality headers he had ever installed. The performance is incredible!!