GrimmSpeed Up Pipe exhaust fits Subaru WRX / STi / ForesterTurbo 02-14 w/Gaskets

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 04-13 Subaru STI / 02-13 WRX / 05-09 LGT / 09 FXT Uppipe 


Factory Packaged Product

Manufactured by GrimmSpeed

• 1 Grimmspeed UpPipe

• Mounting Gaskets

• Anywhere in USA, CANADA, Mexico, Europe, Germany, Australia and United Kingdom



Vehicle Fit:


2004  --2006          SUBARU BAJA TURBO H42.5 TEJ255

2004  --2013          SUBARU FORESTER SPORTS 2.5 XT

2005  --2006          SAAB 9-2X AERO H42.0;2.5 TEJ205;EJ255grimmspeeduppipe2.jpg

2005  --2009          SUBARU LEGACY GTH42.5 TEJ255


2005  --2009          SUBARU OUTBACK BASE EJ255


GrimmSpeed HiFlow UpPipe: Adding an aftermarket Up Pipe is one of the first things you should do to your Subaru. Arguably one of the best $/HP ratios. Our goal was to make a premium heavy duty Up Pipe for you.

*Design*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.

*Materials*This 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).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. All fabrication is completed by a Welder/Fabricator who is certified in Aerospace Welding..

*Performance* Flow Bench Results vs. OEM at 28" WC

OEM Catless - 244.6 CFM

OEM Catted - 164.7 CFM

GrimmSpeed - 292.6 CFM

Spool Up 

Application specific but generally you will see 300-400rpm quicker spool up

HP Increase 

Application specific but generally you will see 8-10HP increase


*Quick Specs* Gaskets Included - Heavy Duty GrimmSpeed Gaskets

Flex Joint - 321 Stainless Steel "Tuned-Bellow"

Tubing Thickness- 14 Gauge Piping Thickness - 33% thicker than most competitors

Pipe to Flange Connection - Cut-Back flange allows much smoother connection. Piping is ported 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

Reduce turbo lag


NOTE: Before any ACEP part is available to the public, ACEP designs are protected by DESIGN PATENTS / PATENT PENDING. Please before you purchase any similar design confirm it was designed or manufactured by ACEP.


Warranty Information
All returns accepted
Your buyer should contact you within 14 Days after receiving the item.
Refund given as Money Back.
Return shipping will be paid by your buyer .
Additional return policy details:
CUSTOMERS RESPONSIBILITY: There is no money back or exchange if the vehicle has been in any past collision and the part does not fit correctly. If the item is altered in any way, cut, shaved, sanded, or painted by anyone other than the manufacturer ACEP Styling, we assume no responsibility to the item or customer Installation instructions included | Professional installation highly recommended | Product intended for off-road use If you have any question or need customer service. We assume no responsibility of automotive laws required by the state, all items are for off road or show use only. RETURN POLICY: You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).