C&L Performance is proud to announce another truly unique and innovative
product for owners of 1999-2004 Lightning and 2002-2004 supercharged
Harley trucks. This new upper intake manifold replaces the stock unit
that delivers air from the throttle body to the inlet of the
supercharger. During the development of this item, we found many
improvements could be made over the original design. The most obvious
of which is the fact that the opening at the blower end is actually
smaller than the supercharger inlet. Roots style superchargers are
extremely sensitive to restrictions on their inlet, and their actual
efficiency can be improved by simply reducing airflow restrictions at
the inlet side of the charger.
After flow testing this new design, we are happy to report that it has
exceeded our expectations. We have supplied a flow diagram below so
that you can understand how this new manifold can benefit your
particular application. Most people who have already upgraded their
factory throttle body to a single blade design have reported gains in
performance ranging from between 7 to as much as 10 additional
horsepower. Flow testing has shown that this arrangement increases
airflow through the stock upper manifold by 10.9%. People who already
have the single blade throttle body and upgrade to our new intake will
see a nearly 20% greater improvement in flow, for a total flow
improvement of 29.8 % over the stock throttle body and intake combo.
For those people who do not have an upgrade throttle body and would like
to upgrade the intake manifold, you will be rewarded with a 14% increase
in flow over stock, which is greater than the improvement that people
have seen in the past when installing a single blade throttle body. The
suggested price for this new intake is $299 which makes it a good value
as a bolt-on upgrade.
| Intake Configuration | Flow Rate | % Increase Over Stock |
| Stock Plenum/TB | 850 CFM | Baseline |
| Stock Plenum/Single Blade TB | 943 CFM | 10.9% Increase |
| C&L Plenum/Stock TB | 970 CFM | 14% Increase |
| C&L Plenum/Single Blade TB | 1103 CFM | 29.8%
Increase |
Dyno testing of this intake on multiple vehicles has shown a typical increase of 12-14 HP and as much as 24 ft/lbs of torque when changing the upper manifold by itself. When used in conjunction with a single blade throttle body, gains of between 19-21 HP and as much as 30 ft/lbs of torque are possible. A boost increase of slightly more than 1 additional PSI has been measured, due to the fact that the efficiency of the supercharger is increased through reducing the restriction of airflow entering the inlet of the blower case. This manifold is fully compatible with the Magnum Powers and Kenne Bell upgrade supercharger conversions without any special modifications. Due to the fact that it is possible that the installation this mainifold may change your air/fuel ratio, an adjustment to your computer tune might be necessary to receive the full benefits of this product. This would be most likely on vehicles that currently have an agressive tune. Vehicles with typical bolt-ons and a safe base air/fuel ratio are not likely to require any tuning adjustments. This product is available for immediate delivery, and is available either directly through us or any of our distributors.
