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View Full Version : 135i Turbo Engine (N54 / N55), Exhaust and Drivetrain Modifications


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  1. HELP! What is this noise?
  2. Low Boost Pressure After DP Install
  3. Taking in for turbo warranty, just a few last questions.
  4. Limp mode problem!
  5. Engine Oil light is on after recent Oil Change
  6. MHD .bin help!
  7. Improving Shift Feel - SSK?
  8. Meisterschaft e92 n55 Downpipe question
  9. AR Padua N54 Single Turbo Setup
  10. Car is at dealership, they can't duplicate issues
  11. Fuel-It Stage 1 on pump gas?
  12. Extreme Power House Upgraded shipping boxes for the Burger Tuning JB and JB4
  13. Would this cause coolant leaking / coolant low?
  14. Cobb Accesstuner Race--Remap Cobb Yourself
  15. 1M replica bumper diffuser exhaust fitments
  16. BOV sticking open
  17. N54 with 2 N55 turbos
  18. HEEELLPPP
  19. 5 Suspension Mods That Can Ruin Your Car
  20. Who has tried this MHD mount?
  21. DCT delay fixed
  22. Limp mode power without Limp mode/SES light
  23. Confused ???
  24. M Performance Exhaust
  25. VTT Turbo: Make a Guess whether a good or bad comments is coming?
  26. BOV release while on throttle
  27. Dyno Session W/ESS tuned 135i!
  28. WOT misfire at 4-5k
  29. Accessport Gauages to monitor mods
  30. N55 engine DEAD!!!
  31. JB4 on top of Dinan?
  32. 135i N55 Jb4 vs 435i N55 ECU Tuning
  33. P30FF, help please!!!
  34. whistle
  35. Oil found next to coil (N54)
  36. Walnut blasting bay area
  37. Installed JB4 now bad waste gate rattle
  38. Installed jb4 back into car now car won't run
  39. Active Autowerke FMIC or Wagner?
  40. How ridiculous is this estimate? HAHA
  41. My 135i vs. CTS-V, GT500, Viper ACR, 335i, C5 Z06, S6, etc.
  42. jb4 map 5...only boost to 6psi
  43. DELETE
  44. what is this noise? (video)
  45. Jb4 pin out harness
  46. BMR 3.5" Single Turbo Exhaust
  47. What is the setup on this car?
  48. AA FMIC Fitment
  49. FMI KIT with piping Vs no piping
  50. Another Happy ProTuningFreaks Custom Tune
  51. Please help any idea what happened?
  52. nevermind
  53. 135is Dinan Stage 3 Dynapack
  54. Does anyone have a sound clip of the AFE Catless Resonated DP for the N55?
  55. miss fire at low rpm on highway/running lean bank 2
  56. "Ultimate Clutch Pedal" or.... ???
  57. PCV VTA?
  58. Going crazy....
  59. Running lean logs jb4 fbo
  60. Which Flash Map?
  61. Cobb Stage 1+ Drive vs Sport Mapping on California gas
  62. Need help with code descriptions
  63. How to tell if my N55 has been tuned?
  64. Can anyone in south Florida install exhaust
  65. Slightly rough idle and hesitation.
  66. JB4 App
  67. Magnaflow Axle Back?
  68. weird squeek noise after installing JB4 VIDEO INSIDE
  69. Are the turbo heat shields necessary?
  70. P3 Gauge w OBD2?
  71. Anyone in south florida know a good wheel repair shop?
  72. 3.08 vs 3.46:1 LSD
  73. speeding
  74. Transmission issues (video inside)
  75. Bms meth kit tank
  76. Cobb AP can't be installed post software update (2011 135i)
  77. Introducing the New 7.5 inch RACE intercooler from VRSF
  78. Catless DP and Options to reduce smell
  79. Possible HPFP issue please help
  80. Running E30 with MHD tunes
  81. whitish smoke from exhaust/carbon buildup
  82. Anyone has stock exhaust tips off?
  83. Quick jbj4 question ASAP
  84. 100k mile stock? Clutch
  85. Ethanol Question
  86. Water pump failure signs
  87. Video request: N55 with N54 mids and catless DP?
  88. Question on Cobb Std Throttle maps?
  89. boost pressure reduction at high gears!!!???
  90. N55 P36CA code - What does it really mean?
  91. Is my pulley or belt on its way out?
  92. Dyno day!
  93. Burned out 02 Sensor?
  94. Whining noise during hot weather (video)
  95. -42 charge air temp reading on cobb v3 n54 135i
  96. N55 with DCT RPMs fluctiation with AC On Finally Resolved!
  97. Squealing noise, need opinions!
  98. Installing AR Design Downpipes
  99. Figure out my code problem
  100. Squeaking from belt or pulley - any guesses?
  101. Help me choose - PI kit
  102. Is the Phoenix Racing Aluminum Replacement Chargepipe worth the savings?
  103. Walk me through Cobb v JB4 (complete noob)
  104. N55 pure stg2 impressions, E50 dyno
  105. New tuner looking for guidance.
  106. New 135 MHD tune -- SES light on, no codes
  107. Waterpump out the window?
  108. Alternator sending 17 volts.. Help :)
  109. Thinking of just gutting my catted DPs... am I insane?
  110. Cobb AP...did I mess up???
  111. Brand NEW Turbo Blown Off after 4000miles?
  112. Downpipe on a convertible
  113. 2011-2012 difference?? 135i
  114. Delete
  115. How to replace thermostat plug?
  116. HELP!
  117. n55 multiple misfires and ses
  118. ARM racing Intercooler review w/ IAT and etc
  119. Boston area flashing.
  120. 135i Turbo and F30 335i Turbo Swap possible?
  121. n54 running lean in midrange.
  122. Replacing fuel injectors after 100,000 miles?
  123. Bad thermostat?
  124. Cobb AP Stage 1 Aggressive, High Altitude
  125. End of Warranty
  126. Stage 2 Dyno guess
  127. Odd speedometer issue
  128. water pump toast after 33,3xx miles....?
  129. (UPDATED) Photos & Videos of exhaust setup & MHD Tuning Exhaust Burble option
  130. Stock FMIC R&R?
  131. Dinan P1 Power Package
  132. DCT not going into park
  133. Waste gate rattle only when car is warm
  134. dct wheel work with steptronic paddles?
  135. JB4 compatibility
  136. Need a log of wgdc stock tune n54
  137. Looking for N55 PPK experience. Throttle response?
  138. Downpipe Rattle - Where to start?
  139. Let's talk charge pipes
  140. Mystery Problem
  141. Monitoring LPFP/HPFP with Just Cobb AP, No JB4 for the N55
  142. Where can I get the best price on N54 turbos?
  143. HELP please boost issues
  144. Cobb Charge Pipe N54
  145. Just flashed mhd getting error
  146. PE and Downpipe Decision
  147. Installing jb4
  148. Lower charge pipe issue
  149. BMW Power pack+JB4 Compatibility?
  150. MFactory LSD Recall
  151. Post DP install codes, would like some feedback to ensure I'm on the right track
  152. Testing the Oil Level Sensor
  153. N55 BMS Intake Rub -- MAF Screw on Cowl
  154. Mitsubishi Turbos as a stock replacement?
  155. Weird/dumb question.
  156. E85 calculator ?
  157. Another misfire thread -- Persistent 29D2 Cylinder 6 code at all times
  158. chargepipe and intake
  159. LSD install info needed.
  160. Low Boost Pressure
  161. LSD on 100k miles diff. Help.
  162. Clamping force DCT
  163. 360whp @ 10psi
  164. LSD installation. Help
  165. Octane
  166. Sound Generator Delete
  167. AEM Multi Input Meth Kit 30-3350 Install Advice N55
  168. Good or bad deal?
  169. 2011 BMW 135i N55 JB4 problems...
  170. Wastegate Rattle: identifying front or rear waste gate
  171. Strange Exhaust Issue
  172. Any downpipes provide the power benefit without the noise?
  173. Picked up a flood damaged 135i..
  174. p2c57 can someone look at my logs
  175. Ac problem.. Car turning off..
  176. So I installed an MHD OTS tune...
  177. 98DOB rom and Cobb Accesstuner
  178. Installed a Wagner catted DP (N55)
  179. Monitoring engine parameters (MDH??)
  180. charcoal box relocate
  181. Burnt Titanium Exhaust tips
  182. NEED HELP: Turbo and clutch install
  183. O2 sensors swapped, anything I should be worried about?
  184. N55 MT 2011 software update question
  185. Oil Cap Insert: NEED HELP
  186. Seeking west coast based dealer for Wagner Evo 2 intercooler
  187. Is updating JB4 firmware necessary prior to MHD backend flash?
  188. Typical Boost with Cobb AP 3?
  189. N54 stall at start
  190. Help finding axle supplier?
  191. HELP! Car won't go into gear
  192. Water Pump Issues
  193. 60k maintenance on a N55?
  194. What maintenance is left before I tune my car?
  195. Gearbox and clutch issues...
  196. 2012 135i Failing HPFP replaced under 8 year 80k warranty
  197. RB turbo upgrades
  198. NEED HELP
  199. Latest firmware fixes?
  200. ******** COBB Protuning and MHD Custom Tuning
  201. Snap on digital video scope + 65K N55 ENGINE & head porting results ?
  202. Advice/Opinions on Wastegate Rattle
  203. radiator upgrade?
  204. Performance reduction???
  205. VW Waste gate anti rattle actuator rod clip...
  206. Tial Valve- correct spring?
  207. 135i driver side click sound
  208. DIY Experiment - Dual Cone Filters in Custom Colors
  209. Help!! Misfire cylinder 6
  210. N55 jb4 install help
  211. Won't go into reverse gear?
  212. VRSF 1000whp 7.5" Race FMIC Pre-order Now Available!
  213. Vishnu N54 tune for N55
  214. Teach a dummy how to read fuel trims?
  215. TGS N55 PPK Install
  216. No Boost Help!!?
  217. Best current tuning options?
  218. HVAC (Air condition compressor) question..
  219. rear air duct 13717556550
  220. p3100 P2abc
  221. Downpipe design question. O2 sensor
  222. bmw p2c08
  223. Help: smoking
  224. Running Jb4 AND Cobb
  225. N55: upgrading the Internal wastegate actuator ?
  226. Installing Midpipe with just a floor jack?
  227. Was about to replace injectors but...
  228. 135i n55 year 2013 - DCT transmission issue HELP !
  229. Second low boost code
  230. Has anyone built their own stage 2 LPFP?
  231. Weird squealing noise when slowing down
  232. Berk Street Axleback modded?
  233. Midpipes: Berk vs AP vs Maddad
  234. n54 30ff no leaks and limp mode
  235. Quick, stupid question about cables and winkfp
  236. Oil out of bov/car shaking under load
  237. belt creaks? video attached
  238. 29D0 misfiring cylinder 4 after MHD stage 1
  239. N54 Downpipe Fix
  240. New turbos and Wastegate rattle
  241. BMW PE for 2008 135i
  242. 2010 135i Dynojet Results (DP, CAI, Meth, Tune)
  243. JB4 Info
  244. Car not as loud anymore????
  245. LSD with 323 gears
  246. Exhaust questions
  247. Name This Hose
  248. Exhaust popping sounds at idle
  249. Battery replacement help
  250. Maddad or Berk Racing?