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GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
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GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe (Part Number: )
GrimmSpeed HiFlow Exhaust Manifold Crosspipe
Subaru Models (inc. 2002-2005 2008-2014 WRX / 2004-2014 STI)
Read 7 Reviews | 8 Q&As
Part # 001001
$220.00

In stock! Ships same day

Features & Product Details

What's one of the most overlooked anti-flowing Subaru pieces you ask?? ...The stock exhaust manifold crossover. 50% of your exhaust gasses are passing through this tiny tiny pipe and that is not good. Well here comes the solution for this problem.

Welcome the GrimmSpeed Version 2 Subaru Exhaust Manifold HiFlow Crossover. Well they've decided to step it up a notch with the first revision of the crossover. Meet HiFlow Crossover v2. Immaculate welds, smooth as butter 2" stainless steel, thick 12mm stainless flanges. You can't beat this piece.

Customers have seen up to 15 HP INCREASE when combined with a PnP Subaru Exhaust Manifold. This unit is built from 2" 304 Stainless Steel throughout, maximizing exhaust flow from cylinders 1 and 4 to the manifold collector for faster turbo response. This unit has a flex in the center to allow for easier installation and for thermal expansion during hard driving.

This includes all the gaskets necessary for installation.

Specifications

Brand: GrimmSpeed
Flange Thickness: 12mm
Installation Hardware Included: Yes
Piping Coating: No
Piping Flex Joint: Yes
Piping ID: 2.00in
Piping Material: 304 Stainless Steel
Piping Taper: No
Mfgr. Warranty: Lifetime
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days


Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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REVIEWS & CUSTOMER MEDIA

7 Reviews
5 out of 5 Stars
5 Stars
(7)
4 Stars
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3 Stars
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2 Stars
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1 Stars
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Customer Photos and Videos
GrimmSpeed HiFlow Exhaust Manifold Crosspipe ( Part Number: 001001)
GrimmSpeed HiFlow Exhaust Manifold Crosspipe ( Part Number: 001001)
GrimmSpeed HiFlow Exhaust Manifold Crosspipe ( Part Number: 001001)
GrimmSpeed HiFlow Exhaust Manifold Crosspipe ( Part Number: 001001)
Awesome Product! 7 days ago
Kirill C.
Another amazing GrimmSpeed product! The kit comes with everything needed for install in one box, which is always a huge plus. The included gaskets are the multi layer steel units and the hardware was high grade zinc coated steel. The install could not be any easier, and the cross over pipe fit just like stock and there was no need to do any weird adjustments or modifying of surrounding components. Overall construction can is supper beefy with thick flanges, thick wall tubing and amazing welds. The install was straight forward and only took a few minutes when the engine was out (not need to pull motor to do the install)
  
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1 of 1 people found the following review helpful
Excellent 2 years ago
Paul Grimm
this will make you say DAAAAAAANNNNGG Really pairs well with pnp manifolds, for those who like UEL and dont like cracks
  
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1 of 1 people found the following review helpful
Top tier quality  2 years ago
ryanjlucas8826550
Installed this along with porting my stock exhaust manifolds. This is a perfect combination for a daily driver imo. Fit and quality is perfect as expected when you buy anything from grimmspeed. Highly recommended product and worth the money.
  
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1 of 1 people found the following review helpful
Worth The Money 4 years ago
Shane Hollis
Fits perfect, and looks badass on my 05 sti. Plus you get good gaskets with it. Makes it even better. Didn't take very long to install either.
  
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Great buy :-) ... 4 years ago
cylomatik17333
Install was easy.Fitment was great the install video helped out a lot. I installed this with the Invidia High Flow DP and I am VERY happy with it. It is very high quality and everything I expected. Thanks GS and RSD ...
  
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QUESTIONS & ANSWERS

  • Q: 13 xt  Rocker4 years ago

    if i combine this with an uppipe should i get my forester tuned to get the most out of it? or will these just be good to go?
    • 1 of 1 people found the following answer helpful

      A:  Hello, To take full advantage of the parts a tune would be recommended, however, it's not needed to run the car. Mike

      GrimmSpeed
        
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  • Q: Crosspipe  castrocigar23416114 years ago

    Is this like a downpipe where its *offroad vehicles only* or am I smog okay?
    • 0 of 0 people found the following answer helpful

      A:  We do not have the ability to confirm that parts will pass emissions. These parts are meant for offroad use only.

      Nick S. @ RallySport Direct 4 years ago  
        
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  • Q: What map?  HogDweeb5 years ago

    When i get my replacement engine, I'm gonna put this on.. but i dont have the software to read the AP maps. will any of their OTS maps have a tune for this, or do I need a protune? Gonna be doing a stage 2.
    • 0 of 0 people found the following answer helpful

      A:  This crosspipe does not require any tuning and you can use the OTS maps, depending on your other mods.

      Zach G. @ RallySport Direct 5 years ago  
        
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    • 0 of 0 people found the following answer helpful

      A:  Couple posts down, Mike said that a tune is required....

      HogDweeb
        
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    • 0 of 0 people found the following answer helpful

      A:  You will gain more power with a custom tune, but in our experience we have found that tuning is not required for a crosspipe alone.

      Zach G. @ RallySport Direct 5 years ago  
        
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  • Q: Curious  JohnM.5 years ago

    Is this compatible with the invidia ELH?
  • Q: Tune? without will it cause damage?  Aaron Roth5 years ago

    I understand you have answered this question a few times already but I was curious as to if I do purchase this and install it will not tuning it cause any serve or minor damage? I wish to just upgrade from my OEM one to this but I have no plans on tuning for atleast another 5-7 months down the road. So can this cause any damage from not being tuned? Thank you RSD!
    • 0 of 0 people found the following answer helpful

      A:  If you don't plan to tune for it your best option is to leave it off until you're ready. Mike

      GrimmSpeed
        
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This Part Fits

Subaru Impreza
2.5 GT Hatchback
2009 Subaru Impreza 2.5 GT Hatchback
2010 Subaru Impreza 2.5 GT Hatchback
2.5 GT Sedan
2009 Subaru Impreza 2.5 GT Sedan
2010 Subaru Impreza 2.5 GT Sedan
WRX
2002 Subaru Impreza WRX
2003 Subaru Impreza WRX
2004 Subaru Impreza WRX
2005 Subaru Impreza WRX
WRX Hatchback
2008 Subaru Impreza WRX Hatchback
2009 Subaru Impreza WRX Hatchback
2010 Subaru Impreza WRX Hatchback
2011 Subaru Impreza WRX Hatchback
2012 Subaru Impreza WRX Hatchback
2013 Subaru Impreza WRX Hatchback
2014 Subaru Impreza WRX Hatchback
WRX Limited Hatchback
2010 Subaru Impreza WRX Limited Hatchback
2011 Subaru Impreza WRX Limited Hatchback
2012 Subaru Impreza WRX Limited Hatchback
2013 Subaru Impreza WRX Limited Hatchback
2014 Subaru Impreza WRX Limited Hatchback
WRX Limited Sedan
2010 Subaru Impreza WRX Limited Sedan
2011 Subaru Impreza WRX Limited Sedan
2012 Subaru Impreza WRX Limited Sedan
2013 Subaru Impreza WRX Limited Sedan
2014 Subaru Impreza WRX Limited Sedan
WRX Premium Hatchback
2010 Subaru Impreza WRX Premium Hatchback
2011 Subaru Impreza WRX Premium Hatchback
2012 Subaru Impreza WRX Premium Hatchback
2013 Subaru Impreza WRX Premium Hatchback
2014 Subaru Impreza WRX Premium Hatchback
WRX Premium Sedan
2010 Subaru Impreza WRX Premium Sedan
2011 Subaru Impreza WRX Premium Sedan
2012 Subaru Impreza WRX Premium Sedan
2013 Subaru Impreza WRX Premium Sedan
2014 Subaru Impreza WRX Premium Sedan
WRX STI
2004 Subaru Impreza WRX STI
2005 Subaru Impreza WRX STI
2006 Subaru Impreza WRX STI
2007 Subaru Impreza WRX STI
WRX STI Hatchback
2008 Subaru Impreza WRX STI Hatchback
2009 Subaru Impreza WRX STI Hatchback
2010 Subaru Impreza WRX STI Hatchback
2011 Subaru Impreza WRX STI Hatchback
2012 Subaru Impreza WRX STI Hatchback
2013 Subaru Impreza WRX STI Hatchback
2014 Subaru Impreza WRX STI Hatchback
WRX STI Limited
2007 Subaru Impreza WRX STI Limited
WRX STI Limited Hatchback
2011 Subaru Impreza WRX STI Limited Hatchback
2012 Subaru Impreza WRX STI Limited Hatchback
2013 Subaru Impreza WRX STI Limited Hatchback
2014 Subaru Impreza WRX STI Limited Hatchback
WRX STI Limited Sedan
2011 Subaru Impreza WRX STI Limited Sedan
2012 Subaru Impreza WRX STI Limited Sedan
2013 Subaru Impreza WRX STI Limited Sedan
2014 Subaru Impreza WRX STI Limited Sedan
WRX STI Sedan
2011 Subaru Impreza WRX STI Sedan
2012 Subaru Impreza WRX STI Sedan
2013 Subaru Impreza WRX STI Sedan
2014 Subaru Impreza WRX STI Sedan
WRX STI Special Edition Hatchback
2010 Subaru Impreza WRX STI Special Edition Hatchback
WRX Sedan
2008 Subaru Impreza WRX Sedan
2009 Subaru Impreza WRX Sedan
2010 Subaru Impreza WRX Sedan
2011 Subaru Impreza WRX Sedan
2012 Subaru Impreza WRX Sedan
2013 Subaru Impreza WRX Sedan
2014 Subaru Impreza WRX Sedan