Originally Posted by cutsupreme
Right now Im running a pair of shorty headers on my 87 caprice. It is connected to the rest of the exhaust by a couple pieces of stainless flex pipe and a flowmaster y-collector then continues as a single exhaust. I hate using flex pipe. It works OK but it just doesn't seem right to me. The flex pipe going from the drivers side header to the passenger side of the car hangs a bit low because the header comes down low. I took it to a couple of shops around to see if they would bend me some real pipes but they wouldn't tackle it because the bends would be too tight. So I've been running it this way for the past two years. There are little leaks where ever the flex pipes connect, and they're just getting way too annoying. Since then we have gotten a couple of actual exhaust shops nearby. So I was thinking about taking it to one of these shops. A few of my friends have gotten exhaust work done there and they have come out pretty nice. The problem is that they are a bit pricey. I figure it would probably cost me at least three hundred bucks to get my pipes bent, if they will even do it.
So lately i have been thinking about just starting over from scratch. I figure I could put on a set of full length headers and just run dual exhaust. It seems like it wouldn't cost me too much more to do this. I can probably get a set of headers off one of my friends for free, if not then just buy a cheap set. I will have to buy another cat. In Jegs they have their brand of dual exhaust kits that cost under 200 bucks. They don't make a kit made for the caprice. So I figure there is probably a kit they make that I could make work? My question is which one would be the closest fit. Also will full length header fit on my caprice? Or does anyone have any other ideas?
Thanks for the help
Custom exhaust is always pretty expensive. I guess I have a problem with a shop that says the bends are too sharp for them to make. Usually shorty headers come well short of where a bend needs to be to wrap back under the vehicle. Although angles can be a headache like an S-10 SBC with Sanderson shorties on the passenger side requires a 60 degree bend, not something you find at JC Whitney.
You will have problems with the left side of the transmission cross member as it needs a raised section on that side for pipe clearance, otherwise the pipe gets pretty close to the street. G-Force makes a B body crossmember for this application they are about 260 dollars. If you have a welder, you can modify the one you've got.
Long tube or Tri-Y's would be a better choice than shorties as they emphisize low and mid range. Shorties can be made to work harder in this area by placement of the H pipe. If you come off the collector flange with a head pipe the same diameter, drop it down under the floor. From the mid cylinder exhaust ports measure a distance of 36 to 46 inches and put the H pipe in this range. This will make the shorties work more like an individual runner or Tri-Y. Not as good, but better.
I'd say for a custom set of duals expect to pay around a 1000 dollars for parts and labor.