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GES also pays plenty of attention to intake ports. Heads destined for the 440-horse longblock get Stage 1 runner porting. Those meant for the 480hp version, as shown here, get Stage 2 porting, which means that the stock 180cc runner is hogged out to 190 cc.
LT1 Engine Build - Small-Block 2.0

 GES also pays plenty of attention to intake ports. Heads destined for the 440-horse longblock get Stage 1 runner porting. Those meant for the 480hp version, as shown here, get Stage 2 porting, which means that the stock 180cc runner is hogged out to 190 cc.  View Related Article

 

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