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We have developed a great alternative mount for holley guys running the 3.5 inch screen in your gmt 400 trucks.  This snaps into the oem vent hole with the vent removed.  snap in very tight for no movement and easy viewing.  

1988 to 1994 Chevrolet Silverado OBS vent mount for a holley 3.5 inch mount

SKU sku-44635438973125
$49.00
$49.00

We have developed a great alternative mount for holley guys running the 3.5 inch screen in your gmt 400 trucks.  This snaps into the oem vent hole with the vent removed.  snap in very tight for no movement and easy viewing.  

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