You'll remember in Part 1, we removed the stock exhaust system from our '87 in preparation for an upgraded exhaust system that includes a gorgeous set of headers from Stainless Works, a high-performance catalytic converter from Random Technology, and a cat-back system from Corsa.
Removing the old system was no big deal. the only casualties were a couple of broken exhaust manifold studs, which we'll leave to whoever decides to restore this car 25 years from now. installing the left-side header was pretty straightforward as well, with a couple of minor complications such as having to make up a new rear alternator support bracket and stud, and accommodating a too-close-for-comfort fit between the header and the oil line that runs from the oil filter housing forward to the engine block.
This time we'll install the right-side header and the rest of the system. as you'll see, installing this header presented some interesting challenges that required a healthy dose of creativity and patience. In fact, we give high marks to the folks at Stainless Works for designing a header that fits where few other headers would dare to tread. It's just that the passenger side of the engine compartment was designed to accommodate assembly-line parts, and the original exhaust manifold was integrated into the design. Aftermarket suppliers, on the other hand, have to work within the space available and be inventive enough to design headers that breathe properly, while providing as much clearance as possible with other parts and systems.
the job was, at times, difficult and challenging, but worth the effort. The result is an exhaust system that has just the right sound and just the right look-subtle, yet serious-while affording ground clearance and decibel ratings that are just fine for a daily driver without being obnoxious. we also expect the benefits will extend to our next trip down the quarter-mile. We'll keep you posted.
C48591 '85-'91 Corvette headers plus
NBC250 (4) accuseal high torque band clamp
EBC250 (2) accuseal wide high torque band clamp
191-30001 high-performance catalytic converter w/accy's
Mid America Motorworks
628-096 Corsa exhaust system cat-back
603-930 catalytic converter hose kit
614-559 (2) muffler insulators
Local speed shop
ARP header bolt kit
Header gasket set
Local Chevy dealer
Tools Of The Trade
In addition to everyday hand tools, such as screwdrivers, wrenches, and sockets, you'll also need:5/16-inch, 12-point, 1/4-inch drive socket for header bolts
1/4-inch open end or box wrench for hose clamps for A.I.R. hose
Torx T-20 socket
Improvised spark plug wrench