Well I got my car booked in for a new exhaust tomorrow, but am not sure whether to get a 2.5" mandrel bent exhaust or to go for a 3" system with crush bends!

the 3" system is a lot cheaper but I'm not sure whether its a bit overkill, this is for a B16 CRX turbo by the way.

Any advice would be helpfull

 

2.5 mandrel.

3" crush would be okay, but the crush bends tend to be very restrictive.

 

i wouldnt have thought the 3" crush bends would have an internal diameter of less than 2.5" though

 

def.ly go with the 3'.
i switched from 3 to 2 1/4 and felt a hugh power lost.

 

Fluid dynamics son. If you keep chaing the diameter of the piping, you lose velocity. That is what exhaust is all about, velocity.

 

true. Get the 3" exhaust and buy some mandrel bends to weld in later when you get more cash.

 

or just get some flexible exhaust piping from auto zone and do it yourself.

 

or get a shitty welder from harbour freight, and weld your own... probably cost the same as your custom setup.. what place has mendrel bent 2.5inch but not 3.... find some where else.

chris

 

I went from 2 1/4 Mandrel to 3" Whitey Bend, Got a nice gain. Datalogged earlier boost, and no loss a top end!

I would say go with 3" and latter change the bends with mandrel

 

I didnt say they didnt have 3" mandrel bends, a 3" system with crush bends is about £100 cheaper than a system with 2.5" mandrels