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- 2002-2005 WRX
- 2006-2007 WRX
- 2008-2014 WRX
- 2004-2007 STi
- 2008-2014 STi
- 2015-2018 STi
- 2004-2008 Forester XT
- 2009-2013 Forester XT
- Brand: GrimmSpeed
- Manufacturer's Part Number: 059001
- Size: 38mm
- Primary Material: 304 Stainless Steel
- Disclaimer: Intended for off-road use only
- Installation Guide (PDF)
- Manufacturer's Warranty: Lifetime Warranty! Please see GrimmSpeed's Website For Details.
- We ship internationally! Please email us for international shipping quotes.
- Diameter: 1.834" Piping
- Flex Section?: Yes: 321 Stainless Steel "Tuned-Bellow" w/ Interlocking Liner
- Off Road Use Only?: Intended for off-road use only
- Kit Contents:
(1) Dump Pipe
Upper & Lower Gaskets
ARE YOU READY FOR FAST SPOOL AND TOP END POWER?
An External Wastegate (EWG) allows exhaust gases to be diverted prior to entering the turbo; creating quicker turbo spool. The GrimmSpeed EWG has a larger diameter than a stock internal wastegate; this allows the exhaust gas to be released faster, which improves boost control, maintains maximum boost longer in the rpm range. All of these together will give you a 10-40 HP INCREASE. Moving the wastegate out of the turbo relieves the turbo from the massive amounts of turbulence that the stock internal wastegate creates.
Gaskets Included - Heavy Duty GrimmSpeed Gaskets
External Exit Tube - Designed in Solidworks for optimal flow from main tube
Flex Joint - 321 Stainless Steel "Tuned-Bellow" w/ Interlocking Liner
Tubing - 14 Gauge 304 Stainless Steel Piping w/ Brushed Finish - 33% thicker than most competitors
Pipe to Flange Connection - Cut-Back flange allows much smoother connection. Piping is flush with flange so there is no step into the pipe.
Flanges - 1/2" 304 Stainless Steel CNC Milled - All 3 sides are milled for precise tolerances in manufacturing
Optional ceramic coating
Increased HP by 10hp-40hp
Reduce turbo lag
We designed this Up Pipe using our in-house FARO Arm along with the latest and greatest Solidworks CAD software. This assures that we can offer you the most precise and best fitting Up Pipe on the market. In short, OEM exhaust manifold pieces are inconsistent so we used our reverse engineering hardware/software to scan countless OEM pieces to determine the range of best fitments for our aftermarket pipe. This allows us to be very confident that your flanges will be leak free and the Up Pipe will fit nicely.
Our Up Pipe has been made with beefy local raw materials. The flex joint is 321 Stainless Steel w/ an Interlocking Liner and tubing is a heavy duty 14 Gauge 304 Stainless Steel(competitors use thinner 16 GA) that has been CNC Mandrel Bent and finished up with a nice brushed finish. Our flanges are made out of 1/2" 304 Stainless Steel and are fully machined on all sides(competitors typically just laser cut flanges for cost reductions). We also put a nice bevel on the edge of the flange so you don't cut yourself. You're welcome. The insides of our flanges are "cut-back" to allow the pipe to rest inside the flange which gives you a nice flush mating surface thus allowing optimal flow through the pipe. Heck, we started as a Porting company after all....we take pride in exhaust flow quality through our pipes. All fabrication is completed by our Welder/Fabricator who is certified in Aerospace Welding...yeah, he knows his stuff. A bit of overkill using an Aerospace Welder you say? Well the Up Pipe is put through some very harsh environments so we wanted the best for the job.
Also an option with the EWG Up-Pipe package, a bracket to hold the stock internal wastegate shut. This bracket is helpful because the turbo door does not need to be welded shut, decreasing the chance for leaks and allowing for easy removal if necessary. Availabe for many popular turbos, check the box below if you would like to add one to your order.
The GrimmSpeed EWG Up-Pipe Kit fits more downpipes than any other EWG Up-Pipe on the market. Even fits large TurboXS 4" Bellmouth Downpipe!!
Continually re-inventing heavy duty, it's what you can expect from GrimmSpeed
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