I was looking at other vendors in the reviews section and found none on Justin aka GrimmSpeed, so I thought I'd start it off.

Customer service is way beyond excellent, as Justin goes far and above all expectations:

-replies to PMs in a timely manner; great communication before/during/after order
-never hesitates to give advice and help if asked
-straightforward with suggestions on projects
-willing to 'take care of you' if at all possible, if core is available he'll get it out to you so little to no car downtime

My expericence so far with GrimmSpeed applies to:

-Crossover Groupbuy.
-Massive Port TD04.
Great pricing ,fast shipment and product is great as expected for both x-over and turbo.

Also looking out to expand not only his great port and polish skills, but also to provide new and price conscious products; i.e. hood dampners, Phenolic spacers.

Thanks for everything!

Ok so I just got home from my long drive back from Santa Clarita Ca. The drive home had to have been the best time I have spent in my car! The car is ****ing nasty! it moves, and pulls really hard up top and just does not want top stop! My first tune on 6/24/07 I got 304/255......due to some meth problems and a really really hot day! Yesterday I got a amazing 330whp, and 319 torque. Thats 26whp, and 65 Torque, and man that makes all the difference in the world! My only new mods were Grimm Speed P&P with crossover and a turbo XS Dtec! (thanks Sean) Then Tim did what he does best tuning. I am really happy that I made the drive to Yimi sport, and have a round two with Tim.

People I would like to thank!

*Tim Bailey
*Paul, & everyone at Yimi Sport. You guys rock and I'm "hella" proud to say that you guys do work on my car
*Sean, for that great Dtec, it really makes a huge difference!
*Grimm Speed, love the P&P and crossover you guys rock!!
Chris at Scooby Tunner for all hours on the phone and all the great stuff you sold me.

Well to give you some background I bought an 05 sti new, put about 50k on it. Had sways/ohlins/pinks/tophats/clutch kit/catless 3 inch tbe/protuned/some ss lines blah blah bllllllaaaaaahhhhhh, shifter bushings etc...

Well that car was unfortunately wrecked by my friend. Later I decided to go for a super low mileage 2006 but that had tons of parts (although not setup or tuned well). I had it inspected and brought it home................an fp green with turboxs fmic.........well it ran like crap so I took it to get tuned. did just about 300/300 on a mustang vs. my last cars 266/280 (st. 2)..........well I could tell it rev'ed quicker........but the car actually felt slower to me due to response/lag..........I was pretty dissapointed..........felt like I should go to a vf39........

well.....I decided to wait on grimmspeeds ewg uppipe as I knew how important fit/quality is in a part like this and trusted their expertise and well I won't lie.......I know a few people who bought other brand externally gated uppipes and well yeah thats that. ...........oh yea and my shop wouldn't install the unnamed brand.

Well I did the ewg kit 38mm/ pnp header/cross overpipe...............got my car tuned..............

It feels like 100 percent different car........I don't care about numbers or anything but perception.............its awesome.......

I had worked this out to give me more spool/low end but it's all a guess until you get the car back. Well this really did everything i'd hoped and more.........the response is awesome and it just rips through the gears.........unfortunately it's a little scary to drive in the turns now.....................

Well I gained about 30-35 whp............the tuner is very good I must mention as well. thanks ED EQ tuning.................then I decided ehhh turbo upgrade?? well I gotta do vp109 race map..........Ed and I planned to do around 25 psi......but once we got to 23 I was making 395/401 from the 330~335/340lbs..........and before these mods 300/300........

So i got my hp proven which is also nice.......but I could care less because the thing is so responsive and so fast. It feels much more like the st.2. I was really displeased with the performance of my car before this but knew the fp green and my car should be able to be woken up a lot more......that it just didn't feel right..............................well now it does.

Well thanks Grimmspeed (I bugged them everyday to be a first user of the product and they granted that wish however I didn't get tuned until recently due to some un-car related setbacks).............you guys have truly made my car so much more fun to drive.......and given me maybe the most amazing sounds in the world. You guys rock and your customer service is top notch......i've been around the block so this is a very accurate statement.

ps: the quality of the uppipe was probably the best out of anything else i've purchased for a car.

just ordered uncle scottys cocktail from them. I think I ordered it tuesday and got it friday. Thanks justin and grimmspeed

grimmspeed rules, there products are awsome too...

I picked up a set of grimmspeed ported & polished header, and a x-over pipe, amzing port job...I picked up 15whp after i got retuned last week

Grimmspeed rocks! Answered all emails promptly and even sent out a "heads up" email that I thought was pretty cool. I got my black ceramic coated UP on Saturday. Install went smooth and everything lined up perfectly. Great product from a great vendor. I'll definitely be picking up a manifold/crosspipe package from them. Thanks for the shirt Justin!

- Dave