PICS OF OUR 3.5" MAF PIPE 
WITH THE LS1 CHEVY MAF SENSOR INSTALLED ON MY GN.

POLISHED ALUMINUM

SILICONE HOSES ARE NOW STANDARD ON ALL OF OUR MAF PIPES
AVAILABLE IN BLACK OR BLUE

Our 3.5 INCH MAF pipes are available in 16 gauge polished aluminum. Instead of using a bent piece of pipe that rarely fits correctly, we use a straight piece of pipe and make up adapters to get the correct angles for a perfect fit.  These compliment and ensure an exact fit when used with our Big Mouth Cold Air Induction Systems for the 86-7 Intercooled Turbo Regals. They can be also be used with a cone filter attached to the end of your MAF sensor.  

These will fit the Chevy LS1 3.5" MAF sensor and are designed to be used with either the stock type removable inlet turbos OR the integral inlet turbos..  he pictures above show the 3.5" MAF pipe installed on a 87 GN.  It has a Chevy LS1 MAF sensor and TA49 Turbocharger.  

A recent customer requested a 3" MAF pipe to fit his 3.5" LS1 MAF sensor.  To make sure everything would fit properly I bought one myself and converted the GN from the Impala SS 3" I had been previously running up to the bigger sensor.  While I was at it I figured why not make a 3.5" MAF pipe to go with it!  Finished fitting everything and it works out great.  Clearance is  tight to the up pipe and I would also recommend relocating your IAC sensor as it would be right up against the rubber adapter that goes to the turbo.  Never could figure out why Buick designed it this way.  It is easy to relocate the IAC with an ANGLE BOSS available from www.BOPengineering.com.  This aluminum block makes the IAC angle over towards the driver's side of the car making servicing this device a lot easier.  I would recommend one even if you are running a 3" MAF pipe. Please note that I have a 1/8" Power Plate spacer installed under my upper plenum but I believe the 3.5" pipe will still fit with a stock setup.    I would recommend our 3" MAF pipe if you are still using the stock MAF or the 3" LT1 MAF.  This pipe is to take advantage of the larger 3.5" MAF sensor.

DIFFERENCE BETWEEN REMOVABLE INLET AND INTEGRAL INLET TURBOS

 
 Here's a good pic of how to tell the difference between a removable inlet and integral inlet turbo. The turbo on the LEFT has an integral inlet and is a TE series.  The turbo on the RIGHT is a TA series, notice the bolt on inlet bell.  (click on the pic to see full size)