1986-1987 Buick Turbo Regal -
CATALYTIC CONVERTER TEST PIPE & 4-BOLT FLANGE GASKET
This is a stainless steel replacement pipe to eliminate the catalytic converter for off road use only. It is a bolt in replacement complete with the proper 1/2″ thick 4-bolt flange at the one end.
Overall length is 19″ and the 4-bolt flange is almost 1/2″ thick for support. The inlet diameter is 2-1/2″ wide.
The end result is a free flowing exhaust for “Off Road Use Only.” You must have a stock length downpipe for this to fit properly.
Each test pipe comes with a specially made gasket for the 4-bolt flange end.
NOTE - You may also be interested in these related items - #6996 PYPES Performance Dual Exhaust System, #6567 EPA Certified Low Restrictive Stock Catalytic Converter, #6720 EPA Certified Low Restrictive 3â€³ DIRECT Replacement Catalytic Converter, #7422 Catalytic Converter Test Pipe & 4-Bolt Flange Gasket, #7659 Catalytic Converter Replacement Hanger Loop, and #7809 Test Pipe with Dump Pipe (includes Gasket, Block-off Plate and Hardware).
NOTE - We also offer the 4-bolt flange gasket separately, Part #7423.
7422 - 1986-1987 Buick Turbo Regal -
Catalytic Converter Test Pipe & 4-Bolt Flange Gasket