Precisely. Some guides go waaaaaaaay into the port and have a huge OD. Jeff's TR8 is a perfect example, big around and very long, they stick way down in the runner and if they could be cut back he'd pick up a lot of CFM with no detriment to function.

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Ron Earp
NC Region
Ford Lightning
RF GT40 Replica
White Jensen-Healey ITS
Silver "Skull" 260Z ITS