Installation Instructions

Exhaust X & H Pipes

 

Q. Do the Off Road H-pipes and X pipes have the EGR equipment and O2 sensor bungs like my stock pipes?

(part numbers affected include: 1507, 1562, 1565, 1566, 1521, 1563, 1616, 1618, 1661, 1662, 1663, 1664, 1665, 1666, 1669, 1670)

A. All of BBK's pipes have the same hookups as the stock exhaust pipes, so that you may simply bolt-up and go.
 

Q. Does the X-pipe really flow better than the H-pipe?

(part numbers affected include: 1507, 1562, 1565, 1566, 1521, 1563, 1616, 1618, 1661, 1662, 1663, 1664, 1665, 1666, 1669, 1670)

A. Yes it does! The X configuration greatly increases scavenging in the exhaust system. Instead of pressure being equalized by a smaller, more restrictive straight piece of pipe, the sides come together in a much more effective design. The X section is larger, and the pipes angle directly into it, meaning the airflow does not have to try and jump from one side to the other to equalize pressure; it is a much smoother transition, leading to better flow numbers than its H-pipe brethren.
 

Q. I currently have a BBK H-pipe on my car. I want to switch to a BBK X -pipe. Will I need to modify anything to make it work?

(part numbers affected include: 1507, 1562, 1565, 1566, 1521, 1563, 1616, 1618, 1661, 1662, 1663, 1664, 1665, 1666, 1669, 1670)

A. No, that should not be necessary. Both pipes leave BBK ready to bolt in place of the stock exhaust pipes, meaning that they should be interchangeable.
 

Q. Will the X-pipe work with my Automatic transmission?

A. The standard-length X-pipes have more than enough clearance to accommodate the standard automatic transmission.
 

Q. After installing a BBK Off Road X-pipe on my vehicle, I experience a tinny resonation from my exhaust system. Is this normal, or is something loose?

(part numbers affected include: 1616, 1618, 1661, 1662, 1663, 1664, 1665, 1666, 1669, 1670)

A. More than likely there is nothing loose in your exhaust system. Off-road X-pipes have nothing that could really ever come loose inside. Also more than likely is that you are running a Flowmaster cat-back system. You see, Flowmasters make their famous exhaust note using the science of resonation, where sound waves are bounced back-and-forth, and then recombined with other sound waves to change the sound tone, pitch, and volume. We have noticed over the years that Flowmaster muffler systems when teamed up with our off road X-pipes, can work together to create an exhaust note that not every enthusiast will appreciate. However, there is nothing wrong with either system. Rather, when both are used together you might experience this phenomenon. BBK recommends a muffler system that is a direct-flow type, similar to a Magnaflow or perhaps a Dynomax, should the Flowmaster system not work for you.
 

Q. I seem to have clearance issues with m BBK X-pipe/H-pipe. Is the part wrong or is there a better way to do it?

(part numbers affected include: 1507, 1562, 1565, 1566, 1521, 1563, 1616, 1618, 1661, 1662, 1663, 1664, 1665, 1666, 1669, 1670)

A. BBK recommends that when installing exhaust pipes, you loosely install all the connections first. Then, you will have a little bit of play to "put" the pipe where it fits best, then tighten down the corners equally. You do not want to start at one corner and tighten down fully. This could possibly pull the pipes too tight to one direction, causing fitment problems at other connection ends.
 

Q. What size are my collectors?

(part numbers affected include: 1512, 15120, 1515, 15150, 1525, 15250, 1529 15290, 1532, 15320, 1533, 15330, 1541, 15410, 1516, 15160, 1519, 15190, 1594, 15940, 1569, 15690, 3520, 35200, 3521, 35210, 1511, 15110, 3510, 35100, 3511, 35110, 3515, 35150, 3516, 35160, 4005, 40050, 4006, 40060, 40000, 40010, 40040, 4002, 40020, 4003, 40030, 1567, 15670, 1568, 15680, 1596, 15960, 15950)

A. With the exception of the primary runners, all of BBK's exhaust piping is 2 ½ inches. So all of our collectors as well as our H and X-pipes are listed as 2 ½ inches in diameter.
 

Q. I purchased a BBK X-pipe/H-pipe with High-Flow catalytic converters for my Mustang. Do I need the MIL eliminators?

(part numbers affected include: 1521, 1563, 1618, 1662, 1663, 1666, 1670)

A. The MIL eliminators are designed to receive a certain voltage from a system without cats and transform it to a voltage that the computer will accept, so as to NOT trip the dummy light in the dash. Since your system has catalytic converters already, the MIL eliminators will not be necessary. Your system should run well within catalytic efficiency parameters.
 

Q. I was thinking of purchasing a BBK H-pipe/X-pipe. Will I be able to retain the factory exhaust manifolds and muffler system?

(part numbers affected include: 1507, 1562, 1565, 1566, 1521, 1563, 1616, 1618, 1661, 1662, 1663, 1664, 1665, 1666, 1669, 1670)

A. Yes. The BBK Full-Length Mid-Pipes are designed as a direct bolt-on replacement to the factory H-pipe, so you CAN retain your factory manifolds and mufflers. This can be an important thing for many enthusiasts with new cars under warranty, as some dealerships will not warranty a new vehicle if the factory manifolds have been removed. Since BBK's pipes will allow you to keep them in place, you can get greater horsepower while possibly still staying in bounds of your warranty guidelines. And of course, we remind you that it is your responsibility to follow the manufacturers warranty guidelines!
 

Q. I purchased a BBK header/H-pipe/X-pipe system for my 5.0L mustang. Why won't my collectors line up with the rest of my exhaust piping?

(part numbers affected include: 1507, 1521, 1661, 1662, 1512, 15120, 1515, 15150, 1525, 15250, 1529 15290, 1532, 15320, 1533, 15330, 1541, 15410, 1516, 15160, 1519, 15190, 1594, 15940, 1569, 15690, 1511, 15110, 3510, 35100, 3511, 35110, 1653, 1660, 1671, 1672, 1509, 1510, 1560, 1561)

A. The BBK exhaust pieces are designed around a factory head. In this way, we can ensure that it will fit a factory 5.0L, or any 5.0L with parts that also match factory spec. However, some after market heads DO NOT meet the specs of the factory heads. If the deck height is larger than stock, then it will push the collectors more toward the center, and cause misalignment with the H-pipe or X-pipe. A similar misalignment will occur if you are using a hi-port head, as it will bring the top of the header further up the slope of the head, changing the location of the collector relative to the rest of the car. The problem can seem even more severe when used with Long Tube header systems, as any angle change becomes more noticeable the further away the from the area of rotation. Basically, a small-degree rotation may affect the alignment of a short pipe by less than an inch, but since the collectors on the long tubes are much further removed from the source of the angle change, the difference could be as much as a few inches.
 

Q. I am eliminating my catalytic converters from my exhaust system. Do I really NEED the MIL eliminators, or can I get by with out them?

(part numbers affected include: 1507, 1562, 1565, 1566,, 1616, 1661, 1664, 1665, 1669)

A. Truth be told, you can run without them with no real side effects. The rear O2 sensors are merely an emissions check; they trigger the light if the catalytic converter system should fail, or if the system is bypassed completely (like you are doing). It acts as a flag to notify you and the smog technicians of the fact that there is a 'deficiency' in the emissions system. It should in no way alter the performance and drive-ability of your car.
With that said, however, there is good reason that the after market - and BBK - offers ways to eliminate that Malfunctioning Indicator Light (MIL). Since that is the only interface that your vehicle has to notify you of immediate or impending trouble, if your light is tied up displaying that your cats are missing (something you are aware of), then it really has no way to let you know of any other problems that the system could be experiencing. This has led to a couple different solutions to this dilemma. Some companies offer ways to tamper with the stock ECU (Engine Control Unit) and "turn off" those rear O2 sensors. Here at BBK, we prefer not tampering with the stock computer systems, and feel that our solution is much more prudent, as it doesn't directly tamper with the ECU, which will void just about any warranty. Our MIL eliminators are designed to plug in-line with your stock O2 sensors and wiring harness, and mask the fact that your catalytic system is missing, thus providing the right voltage code to keep the ECU from turning the light on. This will keep the dash looking cleaner and healthier, and help you keep alerted to REAL problems that could affect your vehicles performance.
 

Q. Does BBK make exhaust and intake products for a Mach 1 Mustang?

A. The Mach 1 Mustang utilizes the same basic engine structure as the older Cobra motors, but with the newer EGR systems. With that in mind, most of BBK's product lineup for the newer Cobra should adapt to the Mach 1 with no modification. Our Long Tube Headers should work great, as well as our Cobra Throttle bodies. The only exception to this is with Cold Air Induction kits. As the Mach 1 uses a hood-mounted Ram-Air-like induction system that differs from the traditional system found on the Cobras, the Cobra CAI's will not match up. And to be honest, The Mach 1's induction system is arguably the best non-forced-induction intake design you can have, with not much improvement that can be offered over stock!