Close

    • Comparison of MHP long tube and Renntech shorty M156 headers show poor weld and product quality from Renntech

      Pictures of these Renntech headers (it was confirmed these are in fact from Renntech Florida) were posted up by a BenzBoost user. We all know MHP makes a high quality product and that is seen here with what is clearly the MHP long tube setup. What is stated as the Renntech header appears to be a modified stock setup and clearly is not a long tube or race setup as we were told the customer asked for. An additional claim is that these are $8000 dollar headers from Renntech but in an article posted last week we showed the Renntech long tube headers which are ceramic coated for that price and they look nothing like these.

      We suggest you come to your own conclusion but there is no denying the terrible welds and simply poor quality of the shorty headers seen here vs. MHP. What one can definitively take away is the MHP long tube option is a solid one. We will wait on comments from Renntech and continue to state that Renntech is a high quality option. We also believe Renntech offers a warranty on exhaust pieces so if the owner was upset and this was a Renntech piece this issue would have been taken care of by quality customer service.















      * It was confirmed that these are in fact headers from Renntech Florida.



      This article was originally published in forum thread: RENNTECH versus MHP Headers Pics started by JBond View original post
      Comments 271 Comments
      1. AMG4V's Avatar
        AMG4V -
        Click here to enlarge Originally Posted by Exeenom Click here to enlarge
        I'm on it.... I just sent an e-mail to the customer Click here to enlarge

        AMG4V..... please don't pre-judge the customer. Lets wait and find out the truth and hear both sides of the story before we make any accusations. Maybe the customer is telling the truth and he did get screwed by RENNtech? Maybe not? Who knows....

        I will talk to the customer personally and will post the truth (un-biased) for you guys to decide. I will also try to help him resolve this.
        I am not pre - judging the customer at all, don't know where that comes from.
        however, I do pre- judge jbond who quite obviously has a special agenda.

        And it turns out I am probably right, I have the sneaky suspicion jbond is actually Andy from MHP!!!

        Wow, one question Andy, how do you do it? I mean so many forums, so many different names in each of the forums?? so much ranting and raving???When do you actually do productive work????
        Just imagine all that energy you spending on your low level marketing strategy (attacking the competition with half truth's, made up stories, lies... , all in an attempt to make your stuff look better)

        i thought it was kind of your style, a little bit disguised but lately it shines thru very clear.
      1. 63Master's Avatar
        63Master -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Really? So you have another friend having this exact same problem or you are friends with random Texas Ranchers?
        have you ever installed headers? .......I doubt it

        have you ever tuned your car?.....propabley not

        all you do is hang out in this forum bothering people, and going back to your so called "Texas Ranchers". Really dude, Get a life.Click here to enlarge
      1. AMG4V's Avatar
        AMG4V -
        Click here to enlarge Originally Posted by 63Master Click here to enlarge
        thats ok coming from the person whos feelings seem to always mislead himClick here to enlarge


        I dont know whats been said here. I havent read the pages to this whole thread, but those are exactley the LT header from renntech that my friend paid for $8000 and is now replacing them with MBH.
        You are dreaming, get that invoice, shouldn't be a problem for you since he is your friend, and you find out those are shorties for $3,000+
        or is 63Master actually Andy too???
      1. Yomama69's Avatar
        Yomama69 -
        Maybe you are Andy posting contrary posts to appear not to be Andy.
      1. AMG4V's Avatar
        AMG4V -
        Click here to enlarge Originally Posted by Yomama69 Click here to enlarge
        Maybe you are Andy posting contrary posts to appear not to be Andy.
        Oh wow, there is an idea
      1. Yomama69's Avatar
        Yomama69 -
        I'm probably Andy too. Right? Click here to enlarge
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by ecampbell Click here to enlarge
        What research did you do on this as the headwork is proven to pick up HP on a S/C application.
        Click here to enlarge Originally Posted by mramg1 Click here to enlarge
        To be fair about his statment. On the intake side, he is right that you would not see as big of gain when compared to a NA motor because after all you are forcing the air in. AKA it would be more tolerant to imperfections in the port, valve guide area, etc, etc. since you are forcing the air past these imperfections.
        Yes there is still some gains to be had here, but just not as large as the exhaust side.

        Now on the exhaust he is DEAD wrong. Here is where a FI motor would see a HUGE gain. Keep in mind that except druing the very breif part of valve overlap, the FI motor has the same problem getting the spent gas out of the cylinder as a NA motor. Only more so now as you are forcing more air in.

        How do I know, I have done it an a SCCA world challange car.
        Sorry you are both wrong. I have ported heads for 2000HP+ cars, as well as 600rw N/A 333CI domestic 4V V8s.

        M156 heads are ridiculously good from the factory. We gain at peak 18rwhp and 12rwtq with gains of between 12-18rwhp and 6-12rwtq SAE across the board. Typically when porting you see 30% of gains from the VJ, in this case we see 50% of gains from the VJ, simply because the castings are so good.

        MRAM, do you know what the exhaust flow is on these heads? If you did you wouldn't have made a blanket statement. Your world challenge car didn't have dual 33mm exhaust valves flowing 330cfm+ stock with massive ports. Sorry but in this instance you are wrong.

        The bottom line is especially with a PD blower the gains are always minimal with head porting. Even with $#@! 2v SOHC Ford 4.6/5.4 heads flowing 220/190cfm stock, tiny gains. Why? Again the supercharger is supplying the "mass and velocity" of air so in essence it's the world's greatest band aid. Forced induction always has been. Don't take that as a knock against FI, I'm just saying that it covers for deficiencies elsewhere in the engine. For instance bad intake manifold design, poor cylinder head design, restrictive exhaust, etc.

        Sure there will be some gains, but nothing close to 50HP, more like 15-20HP at the crank. For the $ it's up to the end user to decide if the cost is worth it. I can think of several other ways to spend the same amount of $ for greater gains but if you're dead set on it by all means knock yourself out.

        If either of you wants more detail (amicably of course) you can always call or email. Thanks.

        Thanks
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by AMG4V Click here to enlarge
        I am not pre - judging the customer at all, don't know where that comes from.
        however, I do pre- judge jbond who quite obviously has a special agenda.

        And it turns out I am probably right, I have the sneaky suspicion jbond is actually Andy from MHP!!!

        Wow, one question Andy, how do you do it? I mean so many forums, so many different names in each of the forums?? so much ranting and raving???When do you actually do productive work????
        Just imagine all that energy you spending on your low level marketing strategy (attacking the competition with half truth's, made up stories, lies... , all in an attempt to make your stuff look better)

        i thought it was kind of your style, a little bit disguised but lately it shines thru very clear.
        No jbond is not me Jim/Rich sorry.

        The difference between fake usernames like AMG4V and in this case jbond is going through their post history, one posts facts, the other was specifically created out of boredom and idiocy, and does no one any good. Just search through the posts to confirm. Waste of bandwidth.

        My interpretation of jbonds post was to get the tuner to step up and take responsibility. Looks like Mo is facilitating that so it's a win/win.

        Like Jim or Rich has posted on MBW (kind of funny two guys one username and you're $#@!ing about multiple usernames) the point of the forums is to get legitimate info out there for members to make up their own minds with. jbond does that, AMG4V does not.

        Like it or not what jbond posted in this thread is true and has been confirmed by Mo.

        Your argument is as flat as a board. Next...
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by Yomama69 Click here to enlarge
        I'm probably Andy too. Right? Click here to enlarge
        It's Jim/Rich aka JRCART. So smooth LOL. He just texted me "looks like MHP is taking a beating on the forums".

        Watch out he's a master litigator and will eat you alive in court but has never been to law school, doesn't have a JD and hasn't taken or passed the bar...

        Get a $#@!ing life ROFL.
      1. ecampbell's Avatar
        ecampbell -
        Andy, my ref to bond being wrong as he said there would be minimal if any gains. To me HP is HP plain and simple...that is not being wrong.
      1. JRCART's Avatar
        JRCART -
        Click here to enlarge Originally Posted by ecampbell Click here to enlarge
        What research did you do on this as the headwork is proven to pick up HP on a S/C application.
        Jbond is Andy
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by ecampbell Click here to enlarge
        Andy, my ref to bond being wrong as he said there would be minimal if any gains. To me HP is HP plain and simple...that is not being wrong.
        I guess our definitions are different as far as gains, there are other ways to gain more power for less $ but again if you are dead set, by all means, you will gain some, just not enough for most to consider it cost effective. This is coming from a shop that ports these heads, so take it fwiw.

        The wrong part should have been directed toward Marty's comment about working the exhaust side of these engines.

        Yes I picked up where jbond left off. I port for a living, any questions?
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        Jbond is Andy
        Already addressed. AMG4V is Jim or Rich. Jim and/or Rich aka JRCART think jbond is me.

        Knock yourself out.
      1. MHP LLC's Avatar
        MHP LLC -
        Hey Jim can I see that 660rw dyno graph please?

        I hope it's not the one previously posted here with tq limiter cut out, obviously not a clean graph and one I would never claim to show legit numbers.

        Thanks
      1. JRCART's Avatar
        JRCART -
        Click here to enlarge Originally Posted by MHP LLC Click here to enlarge
        Already addressed. AMG4V is Jim or Rich. Jim and/or Rich aka JRCART think jbond is me.

        Knock yourself out.
        Ok, Andy, keep telling yourself that. Joseph, please compare my IP's to amgV4's IP and let Andy know we are not the same. Now on the other hand I am holding proof in my hands that MHP and JBond have posted from the same device numerous times. Please feel free to sort this out and clarify for everyone Joseph.
      1. JRCART's Avatar
        JRCART -
        Joseph, this is the other device j post from, please compare this IP to amg4v's IP as well, thanks.
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        Ok, Andy, keep telling yourself that. Joseph, please compare my IP's to amgV4's IP and let Andy know we are not the same. Now on the other hand I am holding proof in my hands that MHP and JBond have posted from the same device numerous times. Please feel free to sort this out and clarify for everyone Joseph.
        Same device? Try same network, and like I said, that means $#@!. It's about the content. jbond isn't an employee, and isn't me, so enjoy chasing your tail on this one and don't claim to know as fact what you do not.
      1. MHP LLC's Avatar
        MHP LLC -
        Click here to enlarge Originally Posted by JRCART Click here to enlarge
        Joseph, this is the other device j post from, please compare this IP to amg4v's IP as well, thanks.
        Wait so you an Rich share a cell phone and computer? I would count 4 devices just for the pair of you not including other options.
      1. MHP LLC's Avatar
        MHP LLC -
        Leaving for a few hours, be back to check thread tonight.
      1. JRCART's Avatar
        JRCART -
        Click here to enlarge Originally Posted by MHP LLC Click here to enlarge
        Wait so you an Rich share a cell phone and computer? I would count 4 devices just for the pair of you not including other options.
        Have Joseph verify any IPs we have posted from EVER, not gonna match amg4v.