This eight goal thriller at the Rock Road on Wednesday night saw Rampart Celtic collect all three points.
A delightful chip from Aidan McGuinness saw Rampart go ahead in the 1st minute and the same player stretched the lead 20 minutes later.
Bay hit back with two goals in a three minute spell with Jeffrey Ekwiene and Stephen McQuillan making it 2-2.
Ryan Keelan put Rampart ahead again early in the second-half before Ekiwiene struck again to make it 3-3.
With 15 minutes to go McGuinness was hauled down in the box and Jason Mulligan put the spot-kick away to edge Rampart ahead again before Jamie Kelly wrapped up the scoring.
Seven up for Redeemer
Redeemer United inflicted the heaviest defeat of the campaign, 7-0, on Doolargy All Stars in DkIT last Monday night.
The Gorman Park side led 3-0 at the break, Barry Grimes, Woiteck Gladzy and Barry Carr, from the penalty spot, scoring the goals.
The second-half saw Barry Carr complete his hat-trick before Conor Smyth grabbed a second-half brace