Jb4 for m4.

KennyM340ISouthFLA. · 10-28-2014, 08:19 PM

Very excited car just went into production last week !!!!AW/SO. Had a quick question. Has anyone went with a jb4 for a mod. Just want to make sure that I will not void the warranty. Also want to know if anyone has found out about the gains in hP and torque. Is it we'll worth it. Any input would help. Thank you.

sherm · 10-28-2014, 08:32 PM

Yes there are a few people with a JB4 and your warranty will be voided if the JB4 caused something to happen. Use at your own risk. I myself will not risk taking a chance.

jballs16 · 10-28-2014, 08:59 PM

I've had the JB4 in two of my previous bmws. Ran flawlessly for years. Just take the tune out before going in for service work and you'll be fine.

perf0rmance · 10-28-2014, 10:02 PM

Quote:

Originally Posted by jballs16

I've had the JB4 in two of my previous bmws. Ran flawlessly for years. Just take the tune out before going in for service work and you'll be fine.

jc05e46m3 · 10-29-2014, 09:21 AM

Quote:

Originally Posted by Kennynjm4

Very excited car just went into production last week !!!!AW/SO. Had a quick question. Has anyone went with a jb4 for a mod. Just want to make sure that I will not void the warranty. Also want to know if anyone has found out about the gains in hP and torque. Is it we'll worth it. Any input would help. Thank you.

There are plenty of threads on this already. Check the EAS dyno day thread to start.

///M ARMY · 10-29-2014, 09:25 AM

Quote:

Originally Posted by jballs16

I've had the JB4 in two of my previous bmws. Ran flawlessly for years. Just take the tune out before going in for service work and you'll be fine.

exactly! put it on map 0 and your good.

10-28-2014, 08:19 PM	#1
KennyM340ISouthFLA. Second Lieutenant 170 Rep 241 Posts Drives: X4MC Join Date: Oct 2014 Location: South Florida iTrader: (0)	Jb4 for m4. Very excited car just went into production last week !!!!AW/SO. Had a quick question. Has anyone went with a jb4 for a mod. Just want to make sure that I will not void the warranty. Also want to know if anyone has found out about the gains in hP and torque. Is it we'll worth it. Any input would help. Thank you.
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10-28-2014, 08:32 PM	#2
sherm First Lieutenant 28 Rep 326 Posts Drives: '15 BMW M4 Join Date: May 2014 Location: Las Vegas iTrader: (0)	Yes there are a few people with a JB4 and your warranty will be voided if the JB4 caused something to happen. Use at your own risk. I myself will not risk taking a chance. __________________ ///M4 \| Alpine White \| Sakhir Orange Leather \| Carbon Fiber Trim & Roof \| DCT \| Black 19" Wheels \| Executive Package \| Driver Assistance Plus Package \| Adaptive M Suspension \| Enhanced USB \| Parking Assist \| Harman Kardon
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10-28-2014, 08:59 PM	#3
jballs16 Captain 549 Rep 776 Posts Drives: ‘21 RS6, RR LWB, Raptor Join Date: Jul 2013 Location: so cal iTrader: (0)	I've had the JB4 in two of my previous bmws. Ran flawlessly for years. Just take the tune out before going in for service work and you'll be fine.
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