Prepare for the quickest, easiest, safest way to maximum power! The ultimate Intelligent Turbo Control Module from VAC is ready to upgrade your BMW! 
No wire cutting. No permanent mods. Invisible to ECU/dealer. Industry leading power gains. Easiest to use. A great value! Excellent performance increases for your twin-turbo or single-turbo BMW 6 cylinder; the power of other more expensive, more complex options, with the plug an play ease you want and no warranty troubles.
Applicable to the Turbocharged '07-'11 135i, 335i, 535i, Z4 and X Series (N54 Twin-Turbo models).
2014+ S55 Turbos are now supported! 431HP upgraded to 510HP! 
Now with hundreds of hours of testing on the Dyno, as well as the street- follow up analysis with our trusted network of long time customers, racers, and tuners around the globe provided invaluable feedback in all phases of development. Both BMW dealers and seasoned modifiers were overwhelmed with the improvements this tiny module produces all while being super easy to install, and completely undetectable.
These modules have been used on every current model and ECU software of N54 engine and now for S55 turbo. We have track tested this module at full power for lap after lap with no issues whatsoever. The excellent results our product produces were confirmed as a success.
It is easy: ... to install, easy to move, or easy to remove from the vehicle; even by the novice...Our unit is plug-and-play and by far the best easy of use/ to performance ratio available. Ready to install out of the box; no laptop, map switching or programming required. It can be installed and removed as many times as you wish, on any compatible BMW without ill effects. Includes a 'bypass valet key' that lets you disable and remove the ITCM in 10 seconds so no one  can access the Intelligent Control Module, or steal the unit.It will not require:  "check engine" lights or trouble codes, no flashes, no ECU removal. No permanent modifications. NO PROBLEMS!No  traces of the ITCM are left behind provided for the dealer to see. Thermal management, fuel management, and over-boost control make worries almost non-existent. It goes above and beyond with no issues.It is elegant:  Compact, look at home installed, yet rugged enough for the toughest the road and track can dish out. We include a OEM grade harness, and the unit is enclosed in an extruded aluminum vibration damped case. It can also be hidden to go completely under the radar when you open the hood. This piggyback was specifically designed in both hardware and software development phases to work with the OEM ECU  not aggressively against it as some others. No one would know BMW did not sell this car off the show room floor other than the monster power level it now has on command.It is upgradeable:  the ITCM can be reprogrammed in the event of dealer lockout in the future. Mods like bigger turbos or oversize turbo-back exhaust systems and larger intercoolers, Meth injection, etc. are all compatible with the ITCM.ALSO... If you move on to a 335d, 7 series, X5M or other turbo BMW as they come out, you can take this module with you! Just a new harness and re-flash and your ready! NO others can do this. It performs!!!:  Eliminates nearly all Turbo Lag brought on by dealer flashes, torque is stratospheric! Power is linear and controllable yet has ferocious off the line and highway acceleration. Drivability is completely uncompromised  and performance is very comparable to the E92 M3 or beyond with no other mods. Works excellent with both manual and automatic models. Power levels easily eclipse 115HP increases with other supporting mods like exhaust and intercooler.
Customers car on the Dyno, V2 program VAC ITCM,  here is what he had to say:There have been about 30 individual 335s dyno'ed on this same shop's dyno with every type of turbo tuning product: and the VAC module was within the very top of the pack!   All with only 2 wires and affordable. "I dyno'ed 325 RWHP & 345 RWTQ With no other mods! I am very happy"
5/2010 Update:  The car felt even better with the high flow downpipes, AFE intake and Borla exhaust, I'm outrunning every car on the road!" VIDEO 
 
 
 
 
Includes: 
Intelligent Control Module 
Quick Plug and Play "2-wire" Wire Harness 
Color Instructions 
 
Features:
Fast install 
Free software upgrades 
Fully reversible & undetectable 
Safe, reliable gains 
Satisfaction assured, don't like it? Send it back for a refund 
 
Notes VAC's ITCM Competitors  Competitors  Competitors   
Install 2 wires, plug and play 30-50 min 1-wire, plug and play 20 min Multiple; 8 to as many as 27, some are hardwired, 1.5hours+ None, time varies, typically ECU set to tuner   
Price $499.95 $249.95 $550-1200 $700+  
Gains up to 70WHP & 90WTQ Stock!   (as tested and verified on 100% stock 135 & 335) up to 40WHP & 50WTQ up to  80WHP & 90 WTQ  (Typically as stated on cars with other mods) up to 75WHP & 85WTQ  
Sensors/Safety On Board + ECU feedback None ECU feedback on some Factory ECU based  
Upgradability Reflash & retune capable; adapts to mods like intake, exhaust, downpipes, etc None Many are reflash & retune capable, some by user, Some need tune changed or selected. None, Retune is often required  
Future proof Flexibility  Can be reconfigured for  current and future model turbo BMWs! None None None  
Invisible to dealer Yes & Removable Yes & Removable Yes but codes may have to be cleared and time consuming un-install NO  
Valet Mode/  Yes, complete unit removable in less than 5 seconds with valet key and returns to original performance specs None Basic valet mode on some models. Without antitheft provision None  
 
 
Dyno Plot: Vs.  335i (/w VAC ITCM installed, V1 programming) 
as well as fuel delivery  for ultimate exhilarating rush of power. Ready to install out of the box. The VAC Turbo Control Module is the intelligent module of choice for performance, safety, and reliability.The new VAC V:2 Intelligent Turbo Control Module has been fine tuned at very least  you will see gains 64+ WHEEL HP and 80+ FT/LBS, but often more! 100% stock  BMW 135s and 335s! With many cars dynoing 70+ HP and 90Ft/lbs of Tq! 
Direct plug and play to the following twin-turbo BMW models: 
2006-on E90 Sedan 335i / 335xi 
2006-on E91 Touring 335i / 335xi 
2006-on E92 Coupe 335i / 335xi 
2008-on E93 Convertible 335i / 335xi 
2008-on E60 Sedan 535i / 535 xi 
2008-on E61 Touring 535i / 535 xi 
2008-on E82 Coupe 135i 
2008-on E88 Convertible 135i 
2008-on X6 xDrive35i 
2010-on Z4 sDrive35i 
2010-on F01 740i 
2014-on F82 S55 powered M4 
 
V1 Map 
*High  Performance with boost levels of 12-14psi depending on other modifications *Self a dapts to modifications like intake, downpipes, exhaust, etc.  
 
V2 Map 
*Highest  Performance with boost levels of 13-15psi depending on other modifications *Self a dapts to modifications like intake, downpipes, exhaust, etc.  
 
 
 
Powergains Powergains Powergains  
Up to 70WHP & 90WTQ: V2 (as tested and verified on 100% stock 135 & 335) Up to 50WHP & 85WTQ : V2 ( as tested and verified on 100% stock E60 535 i) Up to 30WHP & 80WTQ : V2 ( as tested and verified on 100% stock F01. )  
 
FAQs: Q: What if BMW changes the ECU, or a new feature comes out? Or if I sell the car? 
Q: What if my car is still under warranty, or I am concerned about reliability? 
BMW Diesel available now! Look below...