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Pypes True-Dual Exhaust Install - Breathing Easier

Project Exit 98 gets a big (and loud) new exhaust system

By Rob Fisher, Photography by Rob Fisher
Pypes True Dual Exhaust Install
Pypes True Dual Exhaust Install
Project Exit 98 sits patiently outside the Super Chevy shop awaiting a new exhaust system

When last we left ol' Project 98, the new 400c.i.d. Dart motor was comfortably between the framerails and a monsterously rebuilt Monster 700R4 was bolted up. The car would finally now move under its own power, but it still had open headers. And while open headers are insanely cool, they make cruising the shore for big haired honeys a little more difficult. So naturally we had to find a good exhaust system that would let our motor breathe while providing a nasty powerful sound that would entice a certain blue eyed brunette.

Pypes True Dual Exhaust Install
The whole system is pre-bent for the car and features slip fit connections which makes mocking it up a piece of cake.
Pypes True Dual Exhaust Install
The whole system is pre-bent for the car and features slip fit connections which makes moc

Enter our friends at Summit Racing. They recommended a system from Pypes, which turned out to be one of the few true dual exhaust systems for these cars. We chose Pypes cross-member back system which features 16 gauge, mandrel-bent, stainless steel pipe, 409 stainless mufflers, an X-shaped crossover pipe, stainless clamps, stainless hangers and polished stainless tips. It came from Summit complete in a single box and turned out to be truly simple to put in, however we did run into a small problem, which you can see in the following pictures. Let's get to it.

  • Pypes True Dual Exhaust Install
    Because of the configuration of the headers, the new 3-inch exhaust actually hit the cross member and wouldn't fit flush against the header flange.
    Pypes True Dual Exhaust Install
    Because of the configuration of the headers, the new 3-inch exhaust actually hit the cross
  • Pypes True Dual Exhaust Install
    At this point we had two choices. We could modify the exhaust pipe by heating it up with a torch and beating on it mercilessly until it dimpled enough to pass the stock crossmember. But that's just plain stupid when there is a company like GForce Performance. So we yanked out the stock crossmember and gave GForce a call.
    Pypes True Dual Exhaust Install
    At this point we had two choices. We could modify the exhaust pipe by heating it up with a
  • Pypes True Dual Exhaust Install
    GForce makes crossmembers for just about any transmission swap into almost any platform you can conjure up, TH350 into a '69 F-Body, Munice in a C3 Vette, a 4L60E into whatever you want and of course the 700R4 in a G-body. It specializes in GM as well as that other car company (and I don't mean Mopar). Just a few days shipping and p/n RCG-700 was at our doorstep ready for installation.
    Pypes True Dual Exhaust Install
    GForce makes crossmembers for just about any transmission swap into almost any platform yo
  • Pypes True Dual Exhaust Install
    GForce's crossmembers are direct bolt in parts, which makes installation a snap, and they even include new mounting hardware.
    Pypes True Dual Exhaust Install
    GForce's crossmembers are direct bolt in parts, which makes installation a snap, and they
  • Pypes True Dual Exhaust Install
    Now when I put the exhaust extensions in you can clearly see I have plenty of room with the GForce design. The beefiness of the crossmember will also add some rigidity to the chassis.
    Pypes True Dual Exhaust Install
    Now when I put the exhaust extensions in you can clearly see I have plenty of room with th
  • Pypes True Dual Exhaust Install
    With the new crossmember in, it's time to mock up the system. The Pypes system includes stainless steel hangers that slide right into the stock location.
    Pypes True Dual Exhaust Install
    With the new crossmember in, it's time to mock up the system. The Pypes system includes st
  • Pypes True Dual Exhaust Install
    The whole system is pre-bent for the car and features slip fit connections which makes mocking it up a piece of cake.
    Pypes True Dual Exhaust Install
    The whole system is pre-bent for the car and features slip fit connections which makes moc
  • Pypes True Dual Exhaust Install
    I measure the 3-inch extension that runs underneath the crossmember and found that needed to cut about 8-inches off of it achieve that perfect fit.
    Pypes True Dual Exhaust Install
    I measure the 3-inch extension that runs underneath the crossmember and found that needed
  • Pypes True Dual Exhaust Install
    With the extension cut it to length, the stainless steel pipe slides right into place.
  • Pypes True Dual Exhaust Install
    From here on out it's just a matter of bolting the extension to the header flange making sure the flange gasket is in place.
    Pypes True Dual Exhaust Install
    From here on out it's just a matter of bolting the extension to the header flange making s
  • Pypes True Dual Exhaust Install
    Then my father, Charles, helps attach the stainless steel brackets that are supplied with the kit.
    Pypes True Dual Exhaust Install
    Then my father, Charles, helps attach the stainless steel brackets that are supplied with
  • Pypes True Dual Exhaust Install
    We could have opted to weld some of these connections and may go back at a later date to do so, but bolting them up works just fine. Plus if we ever want to change out the system, bolting up means no cutting later.
    Pypes True Dual Exhaust Install
    We could have opted to weld some of these connections and may go back at a later date to d
  • Pypes True Dual Exhaust Install
    A close up shot of the completed system easily clearing the GForce crossmember.
  • Pypes True Dual Exhaust Install
    The entire process, from start to finish, was easily completed in an afternoon. Next up is some exterior improvements and a chassis dyno session to see what kind of RWHP we've got--stayed tuned!
    Pypes True Dual Exhaust Install
    The entire process, from start to finish, was easily completed in an afternoon. Next up is
  • Source Interlink Media Techcenter 2011 Logo
SOURCES
Summit Racing Equipment
PO Box 909
Akron
OH  44398
800-230-3030
330-630-0240
www.summitracing.com
G-Force
N/A
www.crossmembers.com
By Rob Fisher
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