3.8L 3800 Series II HV3 High Velocity Intake Plenum Insert 30hp gain 1997-03 L36

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1997-03 Pontiac Grand Prix 3800 3.8L, 1997-05 Buick Regal, 1996-2003 Pontiac Bonneville, 1996-2003 Buick Park Avenue, 2000-05 Chevy Impala and Monte Carlo, 1996+ Buick Lesabre, .  All with the L36 3.8L 3800 naturally aspirated engine.  We have another auction up for the 2004-07 Grand Prix with the aluminum upper intake.  This will fit the engines that have the black plastic upper intake plenum.
The High Velocity Upper Intake Manifold Insert replaces the factory plastic runners in the upper intake manifold found in FWD Series II 3800's.  Simply remove the upper intake (leaving the throttle body attached), pull out the stock runners, set the HV insert in the intake and bolt it back down! 30HP in 30 minutes!

  By changing the intake tuning we are able to achieve performance numbers previously unheard of in the L36. In short we gained 9 peak WHP and 30 WHP at 6000rpm.  When coupled with ER rockers and our HV TB the performance surpasses dyno #'s of cam'd L36's not using our insert.  

More torque - The HP gains of the old HV2 were quite amazing. The only issue was a loss in low end power. This meant that only highly modified setups could take full advantage of the high rpm gains. The new HV3 has slighty longer runners to give more HP and torque in all usable rpms!

Easier install - The new HV3 doesn't require special length bolts, RTV or any modifying of your factory setup. It sits entirely inside of the factory upper intake. It can be installed in less than 30 minutes.

More reliable - The HV3 does not require RTV, cannot be seen by anyone looking at your external engine, and it comes with a new intake gasket. Installing the new HV3 actually improves the reliability of your car by replacing a potentially worn out gasket. Because it sits entirely inside the intake, there are zero sealing issues.

Does not work on factory GTPs or L67s or F-body. FWD L36 Only! Fits all 3800 Series II upper intake Plastic plenums like: 1997-2003 Pontiac Grand Prix, 2000-05 Chevy Impala and Monte Carlo, 1997-2003 Buick Regal, 1996-2003 Pontiac Bonneville, Buick Park Avenue, etc.  Does NOT work for the supercharged engines.  This is the biggest horsepower gain for the money for all naturally aspirated 3800 Series II L36 engines with the black upper intake plenum.  Fits all OEM factory GM upper intake plenums and many aftermarkets.  Does not fit some Dorman intake.  You simply pull out the factory runners that slide out of the factory plenum and install this insert in place of it with the included modified upper intake gasket.  This gasket alone is $30 and is included in this package deal.  We also make one for the aluminum upper intake plenum on the newer L26 3800 Series III engine, but that is on another auction.  You would receive the black colored insert shown in the picture.  The Red one is for the 2004+ newer L26 aluminum intake plenums.  This is made in USA in a high quality poly urethane material.  They last forever and never go bad.   You will feel the increased power in the upper RPM

HV3 insert & Upper intake gasket

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