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Old 04-09-2021, 07:22 PM   #1
a5m
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Default Anyone Install a Cobb Turbo Inlet Recently?

Looking to upgrade my 2010 WRX stock unit because I suspect it’s leaking. Anyone install the Cobb turbo inlet recently? According to them it’s been updated so no more trimming required.

Another thing I noticed is the PCV hose port (nearest turbo) faces up on the stock hose as well as the Perrin, but not the Cobb. It faces the engine.

Initially liked this idea because easier to access in future but there must be some technical reason Subaru put it on top right? Some physics behind how air/fluid flow through it?
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Old 04-11-2021, 04:21 PM   #2
djoye
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I had the pleasure of fighting with the Cobb v1 inlet and then going to a Perrin inlet. Since the v2 no longer requires trimming, that's a major issue that is supposedly resolved, but those inlets are still bulky. As you've noticed, the Perrin is more of a direct OEM replacement because the connections are similar to the OEM inlet. If you want an easier install, go with the Perrin. My Perrin fit super easy, was very easy to clamp to the turbo, and has stayed clamped to the turbo for ~10 months. I think that, because the Cobb inlet is so bulky, it would shift when tightening the intake manifold during installation and bind up at the TGV and it just wouldn't stay securely clamped to the turbo, so I had a post-MAF leak. With the Cobb, power during pulls felt inconsistent until I switched to the Perrin, that's why I'm convinced that I had a post-MAF leak.

I hate to whine, but Cobb must have received enough complaints to convince them to revise the inlet and I'm mad that I wasted $200 on that. Do yourself a favor and buy the Perrin.
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Old 04-11-2021, 04:38 PM   #3
a5m
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Quote:
Originally Posted by djoye View Post
I had the pleasure of fighting with the Cobb v1 inlet and then going to a Perrin inlet. Since the v2 no longer requires trimming, that's a major issue that is supposedly resolved, but those inlets are still bulky. As you've noticed, the Perrin is more of a direct OEM replacement because the connections are similar to the OEM inlet. If you want an easier install, go with the Perrin. My Perrin fit super easy, was very easy to clamp to the turbo, and has stayed clamped to the turbo for ~10 months. I think that, because the Cobb inlet is so bulky, it would shift when tightening the intake manifold during installation and bind up at the TGV and it just wouldn't stay securely clamped to the turbo, so I had a post-MAF leak. With the Cobb, power during pulls felt inconsistent until I switched to the Perrin, that's why I'm convinced that I had a post-MAF leak.

I hate to whine, but Cobb must have received enough complaints to convince them to revise the inlet and I'm mad that I wasted $200 on that. Do yourself a favor and buy the Perrin.
Thanks so much for your reply. I pretty much had decided on the Perrin but this seals the deal.

Sucks to hear of your issues. Not whining, it’s a poorly designed product. The fact the V1 needed trimming is ridiculous. Doesn’t give much confidence they “remedied” this in the V2. It’s already a PITA install to have a leak on top of that afterwards. I don’t know if it’d be worth contacting them to see what they might say.

Yes I like the Perrin for keeping all the factory locations. I don’t know why Cobb moves the crankcase breather hose not only to the side, but all the way to the front.

Also, only realized today after finally going on Perrin’s site and seeing the correct product image. You’re right, it’s basically a silicone version of the factory tube. It’s not as big as I thought. It’s a 2.4”. Should be much easier to install given the limited amount of space.

Hopefully this will not be too bad an install, and also solve a Feedback Knock issue I’ve been chasing since December. Thanks again for your input
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Old 04-11-2021, 04:44 PM   #4
Jay11STI
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I was going to go with the Cobb piece myself a couple a months ago but herd so many complaints about it. I ended up with the perrin piece and its been great. Install was straight forward and fitment was exactly as described. Id recommend going with the Perrin inlet.

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Old 04-11-2021, 05:07 PM   #5
a5m
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Quote:
Originally Posted by Jay11STI View Post
I was going to go with the Cobb piece myself a couple a months ago but herd so many complaints about it. I ended up with the perrin piece and its been great. Install was straight forward and fitment was exactly as described. Id recommend going with the Perrin inlet.

Thanks so much for your input and sharing the pic! It’s settled then, Perrin it is. Definitely worth the slightly higher cost, although if you search hard enough you’ll find it for basically the same price as Cobb.
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Old 04-12-2021, 12:43 AM   #6
Diavolo_
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I did an AVO hose, and it was a pain in the butt.
If I had to do it again I would go Perrin in hopes that would be easier.

Literally took all day to get the fitment right, and im fairly handy mechanically.
I did not have to take off the intake manifold but probably shouldve.
Afterwards I had to buy another avo hose to go from the factory airbox to the inlet because the stock one wouldnt fit. I had to trim that AVO hose and even so its kinda kinked in there. I didnt want to trim the inlet on the airbox side, while it was already mounted, and I wasnt going to take it out again. I wasnt aware they needed to be trimmed anyways, and I dont think trimming it on the turbo side would have helped regardless.
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Old 04-12-2021, 01:14 AM   #7
a5m
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Quote:
Originally Posted by Diavolo_ View Post
I did an AVO hose, and it was a pain in the butt.
If I had to do it again I would go Perrin in hopes that would be easier.

Literally took all day to get the fitment right, and im fairly handy mechanically.
I did not have to take off the intake manifold but probably shouldve.
Afterwards I had to buy another avo hose to go from the factory airbox to the inlet because the stock one wouldnt fit. I had to trim that AVO hose and even so its kinda kinked in there. I didnt want to trim the inlet on the airbox side, while it was already mounted, and I wasnt going to take it out again. I wasnt aware they needed to be trimmed anyways, and I dont think trimming it on the turbo side would have helped regardless.
That sucks. See that’s what I’m afraid of. So far the consensus is these things are a pain to install, but I think that also depends on the hose itself as much as mechanical ability.

I keep seeing Perrin mentioned as easy to install. Based on the experiences shared here I’m confident that’ll be the case.

Surprised to hear another hose that requires trimming. What kind of designs are these
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Old 04-12-2021, 01:44 AM   #8
Diavolo_
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ya i had no idea they needed to be trimmed at all until after i had it in, and i couldnt put my factory airbox back.
i dont think there was anything about that in the instructions either.

figured im paying $200-ish for a hose. the material is not expensive, so a chunk of that change should be in R&D. if i paid $50 i wouldnt complain about it not being a direct fitment :P haha.
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Old 04-12-2021, 02:07 AM   #9
a5m
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Haha my thoughts exactly. If a piece of silicone costs that much it better fit like a glove. Even for $50 I think I’d complain
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