the tied caps on the left and right are 2.0 caps.
6bolt 2.4s come with "free" caps, that do not have that bridge.
the girdle on both sides in that pic is made by kiggly racing.
magnus offers something similar:
4G63 6 Bolt Main Girdle
Did you ever wonder why the 6 bolts never had a one piece main girdle like the 7 bolts? Don’t worry, this piece eliminates the common fretting problem found on the main caps and main bearing wear associated with high revving engines, and more commonly with the 100mm crank engines. The 6 bolt main girdles cleverly help secure the center main to the adjacent mains on your motor. This piece is a must with all high performance engine builds. Note, this piece must be used in conjunction with main studs, and your block must be align honed.