LD4B or LD340

I`ve read where the LD340 was developed for Nascar and is based on the early 340 intakes but with the added performance, not to mention probably 15 lbs. lighter. Some will even have Chrysler part #`s since all stock car pieces had to be made available to the public. As the guys mentioned earlier the LD4B is a performance intake for the smaller port 273/318 engines. Both are good performance intakes but have been superseded by newer models like the Performer.