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Hands down LD4B> The best change in intakes that I made when I was building my car was going from and Performer to an LD4B. This on a 360 and the time slips were a vast improvement. Way more there than when I went from the LD4B to the LD340.




So are you saying you like the LD4B over the LD340?



Not at all. I said that my biggest gain with intakes came with the upgrade from the Performer to the LD4B. A much lesser amount of et reduction was achieved when I swapped out the LD4B to the LD340. I was also all set to switch to and RPM and was told by a major engine builder that the gain achieved over the LD340 would be minimal, if any, I then called Edelbrock than talked to a tech that told me the same thing and to spend my money on something more cost effective.