| Message |
for your needs.
The parts were designed to work the best, and provide the easiest install, for the way we intended them to be used.
Mix and matching parts can require modifying.
IMO it would make no sense to install a 3 inch test pipe to a 2.5" downpipe. Most of the gain in the exhaust system comes from the downpipe, this is because this is the hottest area and has the most pressure.
The turbo responds best with the greatest difference in pressure on each side of the exhaust wheel.
Adding a 3 inch test pipe to a 2.5 inch downpipes will not offer the gains that 3 inch can offer, you have blocked the flow right out of the turbo in the most critical area.
Your dealing with two huge differences in size going from a 2.5" hole to a 3 inch hole. We did not intend for anyone to bolt up a 2.5" pipe to the 3 inch hole size for any period of time. We did intend for people to bolt up the stock cats for testing. We install them for this purpose regularly and they bolt up fine for that purpose.
We made the pipes to make the most sense for the part it was designed to be used with.
The 2.5" two bolt flange hole center is too narrow for a 3 inch pipe. Making the bolt holes closer in on the 3 inch pipe to fit a 2.5" hole will make it much harder to install the pipes on full 3 inch. The bolts and nuts would be tight against the pipe and you could not get a boxed wrench or socket on the bolt/nut.
For me, it makes more sense to make the pipe for how we intend to have the product used. If you want to attach something temporarily or different than we intended, I feel it is reasonable for that person to make the needed modification for their application.
IMO, If you want to permanently install a B&B 3 inch cat back, it makes more sense to slot the hole on the B&B to the wider pattern so you could install the system with a socket or boxed wrench.
 |
 |
