MSD 8401 Installation
HEI Dust Cover Conversion
for a Blaster 2 Coil
PN 8401
WARNING: During installation, disconnect the battery cables. When disconnecting the battery,
always remove the Negative cable first and install it last.
Parts Included:
1 - MSD HEI Dust Cover
1 - Y-spliced Pink Wire
1 - Brown Wire
The PN 8401 Dust Cover allows the use of an external Blaster 2 coil with an internal coil GM HEI
distributor.
INSTALLATION
1. Disconnect the 3-pin wiring harness and the single Pink wire connector from the distributor cap.
2. Remove the dust cover from the original coil and remove the internal coil.
Note: Leave the rotor bushing in place.
3. Install the MSD Dust Cover using the original screws.
4. Connect the supplied Brown wire to the Brown wire of 3-pin distributor connector. Connect the
other end of the Brown wire to the coil negative (-) terminal.
5. Connect the supplied Y-Spliced Pink wire to the single Pink wire (switched 12 volts) and the Pink
wire of the 3-pin distributor connector. Connect the other end to the coil positive (+) terminal.
Note: The middle terminal of the 3-pin connector (Black wire) is not used.
6. Install the coil wire to the Cover.
Note: If you plan to install a tachometer, the trigger wire connects to the coil negative terminal.
Figure 1 Wiring Diagram.
M S D • W W W . MS D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
TECH NOTES
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Service
In case of malfunction, this MSD component will be repaired free of charge according to the terms of the warranty.
When returning MSD components for warranty service, Proof of Purchase must be supplied for verification. After
the warranty period has expired, repair service is based on a minimum and maximum fee.
All returns must have a Return Material Authorization (RMA) number issued to them before
being returned. To obtain an RMA number please contact MSD Customer Service at 1 (888) MSD-7859 or visit
our website at www.msdperformance.com/rma to automatically obtain a number and shipping information.
When returning the unit for repair, leave all wires at the length in which you have them installed. Be sure to include
a detailed account of any problems experienced, and what components and accessories are installed on the vehicle.
The repaired unit will be returned as soon as possible using Ground shipping methods (ground shipping is covered
by warranty). For more information, call MSD at (915) 855-7123. MSD technicians are available from 7:00 a.m. to
5:00 p.m. Monday - Friday (mountain time).
Limited Warranty
M
SD warrants this product to be free from defects in material and workmanship under its intended normal use*,
when properly installed and purchased from an authorized MSD dealer, for a period of one year from the date of
the original purchase. This warranty is void for any products purchased through auction websites. If found to be
defective as mentioned above, it will be repaired or replaced at the option of MSD. Any item that is covered under
this warranty will be returned free of charge using Ground shipping methods.
This shall constitute the sole remedy of the purchaser and the sole liability of MSD. To the extent permitted by
law, the foregoing is exclusive and in lieu of all other warranties or representation whether expressed or implied,
including any implied warranty of merchantability or fitness. In no event shall MSD or its suppliers be liable for special
or consequential damages.
*Intended normal use means that this item is being used as was originally intended and for the original application
as sold by MSD. Any modifications to this item or if it is used on an application other than what MSD markets the
product, the warranty will be void. It is the sole responsibility of the customer to determine that this item will work for
the application they are intending. MSD will accept no liability for custom applications.
M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
© 2012 Autotr onic Con trols Cor poration
FRM28677 Revised 01/12 Printed in U.S.A.
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