need advice

[BlackPearl3500]

trying to see what everyone thinks is a better down pipe for my 04 lb7 its got a mbrp 5inch turbo back but not sure if the previous owner put a new down pipe on it whats the best down pipe its pretty much stock except for bosch 30% injectors all opinions/help appreciated

 

[MadMaxx61]

Not really sure what you are asking.

Are you asking should you do a down pipe? If so yes it will help.

So it has 30% injectors and a MBRP turbo back? You can get in there and look. Most likely it has a Front Pipe but not a new down pipe.

Is the truck tuned? I would like to think so. Fill out your sig so we can help better.

 

[BlackPearl3500]

Not really sure what you are asking.

Are you asking should you do a down pipe? If so yes it will help.

So it has 30% injectors and a MBRP turbo back? You can get in there and look. Most likely it has a Front Pipe but not a new down pipe.

Is the truck tuned? I would like to think so. Fill out your sig so we can help better.

yeah sorry about that kinda new to this forum thing and the diesel community for that matter just got the truck back in march

I know the down pipe will help just trying to see what a good one is and its got a ppe hot 2 et programmer I got it on tune 5 cause if its anything over it limps the stock tranny

how do I tell a stock down pipe from a aftermarket one "where do I find it" I know where the down pipe is just don't know how to differentiate

 

[MadMaxx61]

Stock LB7 down pipe

That is a ProFab down pipe for the LBZ
https://profabperformance.com/jm2/index.php/our-products/lb7-2001-2004/product/10-lb7-downpipe

Rick L from ProFab is a vender here.

DHL LB7 down pipe
https://profabperformance.com/jm2/index.php/our-products/lb7-2001-2004/product/10-lb7-downpipe

Also a vender here

 

[BlackPearl3500]

thanks that's what I was looking for I had been doing a little research and seen that DP a few times will definitely be added to the wish list:thumb:

 

[LWATSON]

Although a downpipe will help it will be minimal at best. The LB7's are a bitch to swap out also, I'd think about it before I spent the time and money. You'd be better off saving the money to put towards a trans build. Just my opinion, just looks like you have more power on tap now than you can safely use.

 

[mike diesel]

Screw the downpipe. Sell the hot+2 and get efi live from a reputable tuner. Hot+2 and those 30% injectors im sure are not playing well together.

 

[BlackPearl3500]

Screw the downpipe. Sell the hot+2 and get efi live from a reputable tuner. Hot+2 and those 30% injectors im sure are not playing well together.

Although a downpipe will help it will be minimal at best. The LB7's are a bitch to swap out also, I'd think about it before I spent the time and money. You'd be better off saving the money to put towards a trans build. Just my opinion, just looks like you have more power on tap now than you can safely use.

yeah no I know for sure its got more than the tranny wants to take

and I would like to get rid of the programmer and get E.F.I live but contrary to popular belief us marines don't get paid that great its all a waiting game

if yall know anyone that's got some cheap parts and can tell me some of the better bolt ons and such the help would me much appreciated

this is my first duramax and im totally lost honestly when it comes to the performance side all help it welcomed

im not so prideful that I cant admit I need all the help I can get

 

[LWATSON]

Lots of people get down pipes, I personally think the gains per dollar just isn't there until you step up to a bigger turbo and a built trans.

 

[02greysixer]

You don't technically need any bolt on parts to surpass what a stock tranny will hold. A good exhaust is step one, which you have, an intake would be step 2 if you wanted one. It isn't necessary though. The ppe is fine, efi will be better though and more customizable. Not to mention less Smokey. Changing a down pipe is not a fun job. At all. You'd save a lot of cussing and aggravation if you waited until you pulled the tranny. My vote goes to save your $ for a tranny build and enjoy your truck in the mean time. And if you keep that tranny out of O.D. when you're romping on it she will be much happier

 

[BlackPearl3500]

You don't technically need any bolt on parts to surpass what a stock tranny will hold. A good exhaust is step one, which you have, an intake would be step 2 if you wanted one. It isn't necessary though. The ppe is fine, efi will be better though and more customizable. Not to mention less Smokey. Changing a down pipe is not a fun job. At all. You'd save a lot of cussing and aggravation if you waited until you pulled the tranny. My vote goes to save your $ for a tranny build and enjoy your truck in the mean time. And if you keep that tranny out of O.D. when you're romping on it she will be much happier

thanks for the tip i'll keep her out of OD it mostly gets around town driving just cause im scared of it limping again on the interstate and it has a banks intake on it

which is the better kit for the tranny the suncoast or the ppe im not looking to run the truck up to 1,200hp (yet) but I still want it to handle enough to impress

 

[TheBac]

You don't need it on a relatively stock truck.

 

[02greysixer]

You don't need it on a relatively stock truck.

I think he's referring to the downpipe and not a built trans. Just to avoid confusion.

If you don't relentlessly beat on the truck your stock tranny can live for a while on a pretty stout tune. As far as which kit, I think they're both good kits but I have no tranny experience. My build is several years out as well and I'm not sure if I'm even going to keep my Allison so I haven't researched much.

 

[BlackPearl3500]

You don't need it on a relatively stock truck.

I think he's referring to the downpipe and not a built trans. Just to avoid confusion.

If you don't relentlessly beat on the truck your stock tranny can live for a while on a pretty stout tune. As far as which kit, I think they're both good kits but I have no tranny experience. My build is several years out as well and I'm not sure if I'm even going to keep my Allison so I haven't researched much.

theBac-thanks for the info i was figuring it was a minimal gain but it was just one of the cheaper ones

02greysixer-i dont beat on the truck that often and even as stock as it is it doesn't take much to get my point across to the ghetto a** Hondas and the occasional 7.3 owner

im trying to find a good tranny shop up here in my area before i just decide to pull it and ship it back home to FL

 

[MadMaxx61]

other things to look at will be Tie Rod Sleeves. Maybe a Pitman/Idler Arm Support Kit or the wield in plate to help it. More so if 4x4

 

[BlackPearl3500]

other things to look at will be Tie Rod Sleeves. Maybe a Pitman/Idler Arm Support Kit or the wield in plate to help it. More so if 4x4

I will definitely look into those can you explain exactly how each of those help is there common problems with the oem ones

and of course 4x4 it wouldn't be a truck without it IMO

 

[MadMaxx61]

That's why you need them.

With the tire size and rims the weight you have on the front you need a stronger setup. Tie rod sleeves are cheap and easy to replace tire rods when they wear out with OEM parts.

Lots or better setups out there but cost a lot and if one of them wear out you are SOL till you can get a new one. That's why I like the sleeves. A lot of the vendors on the site sell them just make sure you get aluminum ones or stainless steel ones nothing that will rust.

PPE sell a great support kit.

Not sure who still makes the wield in support plates still.

The more stress you put on steering parts on the front end with heavy tires and rims means more wear, the more moving you have the more wear you get the support kit helps remove some of that movement and flex same thing with the welding plate

 

[BlackPearl3500]

That's why you need them.

With the tire size and rims the weight you have on the front you need a stronger setup. Tie rod sleeves are cheap and easy to replace tire rods when they wear out with OEM parts.

Lots or better setups out there but cost a lot and if one of them wear out you are SOL till you can get a new one. That's why I like the sleeves. A lot of the vendors on the site sell them just make sure you get aluminum ones or stainless steel ones nothing that will rust.

PPE sell a great support kit.

Not sure who still makes the wield in support plates still.

The more stress you put on steering parts on the front end with heavy tires and rims means more wear, the more moving you have the more wear you get the support kit helps remove some of that movement and flex same thing with the welding plate

yep definitely don't need that I will definitely be getting those with in the next 2 weeks then cause I already have to replace my gear box thanks for the tip its much appreciated