GRIMMSPEED Uppipe 

 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:

2002  --2013          SUBARU IMPREZA2.5 GT;WRX;WRX LIMITED;WRX PREMIUM;WRX STI;WRX STI LIMITED;WRX STI SPECIAL EDITION;WRX TRH42.0;2.5 TEJ205;EJ255;EJ257

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;EJ255

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.