EIP Tuning
410/871-0406
www.eiptuning.com
EIP has four different stages for the 1.8T.Stage 1 starts with a high-boost ECU, CAI and cat-back. It retails for $1200 and is good for 20-30whp with 50-60 lb/ft gains at peak. For an extra $1000, stage 2 nets you another 15whp with more consistency, thanks to the FMIC.
For $2496, stage 3 gives you a choice of two T3/T4 turbos - the bigger one is slightly laggier but good for over 300whp. The downpipe is included in the turbo kit but you'll need EIP software, as well as a 2.5" or 3.0" exhaust, which EIP sells for $650-700.
Stage 4 involves an Electromotive management system and forged pistons for an additional $3500 over stages 2 and 3. Most swap in the optional forged rods for another $1200 as well. EIP also offers 2.0 and 2.1 liter stroker cranks.
EuroCode Tuning
310/294-8108
www.eurocodetuning.com
EuroCode offers turbo-back exhausts from APR, DeCorsa, GHL, Neuspeed and Thermal R&D, ranging from $800-1000. They also sell a cat-delete downpipe for A4s and Passats, reportedly good for 15whp. The firm also distributes APR and Evolution Racewerks products.
Evolution Motorsports
480/317-9911
www.evoms.com
Evolution Motorsports has a program for the 1.8T in conjunction with GIAC. It starts with an ECU upgrade for gains of 30-50hp and continues with a CAI for $295. The CAD-designed FMIC will set you back $1000, but will increase longevity and consistency.
Evolution Racewerks
626/512-3193
www.evolutionracewerks.com
Evolution Racewerks offers Sport and Competition front-mount intercoolers for A4, Golf and Passat, selling them through distributors. Prices range from $1095 for the Sport, to $1395-1595 for the Competition. Both are complete kits including a power steering cooler, and come polished or in a stealthy black anodized finish. The Competition was designed for turbos bigger than the K04 and include a bumper reinforcement bar. ER reports that a 245whp car showed an average 70 reduction of intake temps over stock with the Competition FMIC (see et 9/06).
ER also makes a unique $195 test pipe. Since the K03/K04 turbo inlet is almost 3", the pipe tapers down to 2.5" in order to fit either the factory or most aftermarket cat-back exhausts.
Euro Sport Accessories
800/783-3876
www.eurosportacc.com
Euro Sport sells its Cool Flo intake ($200) and Cool Flo Race intake ($220) for Mk4 Golf and Jetta. Its crank pulley underdrives the accessories 23% to liberate horsepower. Euro Sport also works with GIAC software, which sells for $400-500.
Forge Motorsport
407/447-5363
www.forgemotorsport.com
The $190 Forge silicone intake hose found 13whp during our testing (et 3/06) with improved flow. It also sells a $150 billet aluminum diverter valve, which replaces the factory plastic unit to increase response and durability.
For Mk4 owners who aren't ready for a FMIC, Forge has a $600 side-mount intercooler that apparently gives a 40 temp reduction over stock. Forge does carry FMICs for both Audi TT versions for $1200-1550, which have reportedly shown a good temp reduction.
GHL Motorsports
480/655-0935
www.ghlmotorsports.com
GHL sells a 2.5" turbo-back exhaust for the A4, Golf and Jetta from $810-1050. These systems feature hand TIG-welded 304 stainless steel with mandrel construction, a high-flow cat and lifetime warranty. For high power applications, they also have a $1100 3" turbo-back for Golf and Jetta.
For TT, GHL sells a cat-back exhaust for $900. Downpipes can be purchased separately.
GIAC
www.giacusa.com
GIAC's wide selection of software includes models such as the '99-06 Audi A4, '01-05 TT, '99-05 Golf and Jetta, '99-05 Beetle and '99-05 Passat. The firm also has software for big turbos, including K04-20 and K04-23 turbos on '01-05 Golfs and Jettas, plus K04-15 software for the Passat, and K04-1 or E05 turbos on Golfs or Jettas.
Greddy
www.greddy.com
GReddy sells a turbo upgrade for the Mk4 GTI. It uses a TD04H-19T with an 85mm exhaust housing for good spooling. The $3395 kit includes injectors, adapters, downpipe and AFM (see et 10/06).
Kinetic Motorsport
800/714-9962
www.kineticmotorsport.com
Kinetic has a K04 upgrade, featuring its own turbo manifold and FMIC for $1850, plus software. The intercooler and exhaust manifold, which work on both longitudinal and transverse engines, go for $725 and $295, respectively (see et 1/07).