Buick Grand National
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Upper intake gasket for stock style plenums
w/ extra vacuum fitting for vacuum brakes
The vacuum block is bolted to the top of the throttle body on the 1986-1987 Turbo Regals.
Accufab's 70mm throttle bodys are CNC machined from high quality billet aluminum and then polished to a mirror finish. Each is hand assembled with the finest brass, stainless steel and other top quality component parts.
Includes one throttle body gasket and screws to mount to your plenum
Designed by Champion Racing Heads this item solves clearance problems involving wiring harness connection to the IAC valve when running non-stock turbos with large inlet tubes. The Champion IAC valve adapter indexes the IAC valve 45 degrees in relation to the throttle body. This allows easy access for wiring harness connection.
Cotton's aluminum vacuum block accepts SIX 1/8" NPT fittings for custom vacuum lines... comes with gasket and mounting hardware.
* Does not include fittings
Kit option includes:
12x straight 1/8" NPT fittings
20 ft of 5/32" hard vacuum line
This is a GN1Performance "Stock Replacement Up Pipe" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This item is a great upgrade from the factory steel throttle body up pipe. It is polished 2.5" aluminum pipe and also comes with (2) 2.5 hoses and (4) heavy duty T-bolt clamps.
Complete intake assembly for the Buick Off-Center V6 block with Champion heads. Comes with billet aluminum fuel rails, cast 70mm upper plenum and mounting hardware and bolts. The EGR tower is machined out and welded closed before the final polishing stage. Requires an aftermarket fuel pressure regulator.
Also available for ON-CENTER applications
Race Proven 4 Ply Reducer Coupling! Designed for High Tempearture, High Boost Applications. Won't swell or burst under extreme conditions
Set of two race proven 3" diameter, 3" in-length silicone couplers for your aftermarket MAF pipe, in your choice of color. Four mild stainless worm screw clamps included.
This new design was developed to address the severe airflow distribution issue with the factory upper plenum. The factory upper plenum, although good for its time, has an inherent design flaw that allows significantly more airflow to the back two cylinders which can create a lean condition when increasing the power on these vehicles.
Includes a new GM upper plenum to intake gasket, and new fastener hardware, for a true bolt-on installation.
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Jack Cotton's 8.90 @ 154MPH 1986 Buick