Downpipe What's the best brand ?

[NoNpLuS]

As Jim pointed out, not a very big flex joint which could become an issue because of the size of the dp.

i noticed that. but, if you plan on running stiffer mounts wouldn't that eliminate that being a concern?

DBV2 has a smaller flex section as well. i'll have a quote from them on monday. i enquired about a custom pipe with no reducer , V-bands all the way to the cat section (3 in total) with a vibrant resonator welded into the mid pipe section.

i'm still on the fence with which DP to go with. they all have they're selling points.

 

[jimlloyd40]

i noticed that. but, if you plan on running stiffer mounts wouldn't that eliminate that being a concern?

DBV2 has a smaller flex section as well. i'll have a quote from them on monday. i enquired about a custom pipe with no reducer , V-bands all the way to the cat section (3 in total) with a vibrant resonator welded into the mid pipe section.

i'm still on the fence with which DP to go with. they all have they're selling points.

Even with stiffer motor mounts the DP will still have some torque as the engine moves.
The Trackslag DP will actually droop at the flex section if you pick it up.

 

[El_bigote_AJ]

For the install alone that trackslag Flex section is a god send... my last DP had a flex section just like the mabo, it literally has next to no flex and take so much effort to get it to flex.

 

[PowerDemon]

Isn’t Mabotech garbage?

 

[NopeR]

Tldr:

Does the flex section make it so you don't have to fuck with the subframe on an awd setup? Install is super easy on the gti, but seems to be problematic for the R.

 

[Ezekiel81923]

The 4" DP seems like overkill unless you're running a hybrid or big turbo. Do you really need that much flow on an is38? It should lower WG duty cycle maybe and make it easier to hit boost targets (relatively speaking), but how much low-end do you really need?

I was going to go with a 3.5" CTS unit since I don't think I'll run more than an OEM is38. Unless I'm wrong.

 

[SouthFL_Mk7.5]

Anyone have any knowledge about this lower priced ARM Motorsports Downpipe? Runs in the mid 400 dollar range. Comes available with a 200 cell Hi Flow Cat.

 

[jimlloyd40]

The 4" DP seems like overkill unless you're running a hybrid or big turbo. Do you really need that much flow on an is38? It should lower WG duty cycle maybe and make it easier to hit boost targets (relatively speaking), but how much low-end do you really need?

I was going to go with a 3.5" CTS unit since I don't think I'll run more than an OEM is38. Unless I'm wrong.

Your last sentence is telling. It's the unless you're wrong part. I did the same as you and then you get used to the power and want more. I could have saved a lot of money if I would have just gone to where I did in one step instead of several steps. Then who knows you could be happy with stopping with the IS38. I thought I would be until I wasn't.

 

[jimlloyd40]

Anyone have any knowledge about this lower priced ARM Motorsports Downpipe? Runs in the mid 400 dollar range. Comes available with a 200 cell Hi Flow Cat.

View attachment 201856

Same problem as others. The flex section is too short which will put a lot of stress on the downpipe when the engine flexes from the torque.

 

[El_bigote_AJ]

Your last sentence is telling. It's the unless you're wrong part. I did the same as you and then you get used to the power and want more. I could have saved a lot of money if I would have just gone to where I did in one step instead of several steps. Then who knows you could be happy with stopping with the IS38. I thought I would be until I wasn't.

yup, me too

 

[El_bigote_AJ]

Tldr:

Does the flex section make it so you don't have to fuck with the subframe on an awd setup? Install is super easy on the gti, but seems to be problematic for the R.

My friend did the install on Jackstands on his R... got it in without removing or unbolting anything but said it’s a pain and would be nice if it was 2 pieces.

On my GTI with the car high on quick Jack’s takes under 10 min to get this one in and bolted up.

 

[JerseyDrew77]

Isn’t Mabotech garbage?

Let's just say his products, and especially his tuning capabilities, don't have a great track record or reputation.

 

[GTI_Owner]

As El_bigote_AJ pointed out, the bigger open area that is created in that 4 inch 180 turn is what helps the turbo spool faster because it's now able to push out the exhaust gas faster.

I'd bet on the removal of the catalytic converter being the main source of the improved spool.

A short length of slightly larger diameter piping isn't going to significantly affect the overall flow rate compared to the honeycomb structure in the cat.

 

[jimlloyd40]

I'd bet on the removal of the catalytic converter being the main source of the improved spool.

A short length of slightly larger diameter piping isn't going to significantly affect the overall flow rate compared to the honeycomb structure in the cat.

I'll know next Monday after mine is installed and I am already catless so it will be a fair comparison.

 

[El_bigote_AJ]

I'd bet on the removal of the catalytic converter being the main source of the improved spool.

A bet... from the data engineer himself