Connacht have made five changes from the side that beat The Borders at the weekend for Friday's Celtic League showdown with Leinster at Donnybrook.
Michael Bradley's side, flying high in third position, are boosted by the return of captain Tim Allnutt to the centre.
Connacht's leading try-scorer, Conor McPhillips, returns on the left wing while Chris Keane steps in to replace injured scrum-half Mike Walls.
The two remaining changes are in the pack where former Clontarf captain Bernard Jackman is selected as hooker and Michael Swift named at blindside after recovering from injury.
Alan Solomons has named an unchanged Ulster team from that which defeated Munster in Cork last weekend for Friday's game against the Celtic Warriors at Ravenhill.
Matt Sexton starts on the bench having recovered from a knock on the head which he sustained during Ulster's match against the Gwent Dragons.
Connacht (v Leinster):M McHugh; M Mostyn, D Yapp, T Allnutt, C McPhillips; E Elwood, C Keane; R Hogan, B Jackman, F Boiroux; D Browne, A Farley; M Swift, T Carter, J O'Sullivan.
Replacements: J Fogarty, A Clarke, M McCarthy, P Neville, C O'Loughlion, D Hewitt, S Moore.
Ulster (v Celtic Warriors):B Cunningham; S Young, S Mallon, S Stewart, T Howe; A Larkin, K Campbell; R McCormack, P Shields, R Moore; M Mustchin, M McCullough; A Ward (C), N Best, T McWhirter.
Replacements: B Young, M Sexton, R Frost, R Wilson, R Spee, R Constable, J Topping.