I'm gonna copy & paste some useful info I got from d-series.org:
The only EK Civics that came with rear sway bars are the Civic Type R and the Civic Si, although all EK Civics have the same (Lower Control Arms) LCAs and thusly all accept a rear sway. The Si sway bar endlinks need to be used in conjunction with any factory and most aftermarket sway bars. To make it easy, even the DC2 Integra sway bars will require the Si endlinks, available at any Honda dealer.
When adding a rear sway to a US market Civic, anything over the size of the Si rear sway should have suitable "subframe" reinforcement. The factory Civic Type R which runs a larger-than-Si sway bar has factory bracing to prevent rear suspension damage. The price of a large sway bar's benefit manifests as the sway bar is counteracting the LCA, the sway bar twists. As it twists, the sway bar exerts force upon the subframe and tries to pull itself away from the car. Without any reinforcement for a larger bar, the sway bar will pull itself away from the car on extreme movements and possibly tear away its mounts from the rear subframe. If you are planning on a larger-than-Si rear sway (including the Civic Type R and all DC2 Integra), please consider reinforcement options from Beaks or A-Spec-Racing.
Compatible factory sway bar sizing:
Front:
1992-1995 Civic Si: 21mm
1992-1995 Civic EX: 21mm
1994-1997 del Sol DOHC: 24mm
1996-2000 Civic EX: 22mm
1996-2000 Civic HX: 22mm
1999-2000 Civic Si: 26mm
1997-2000 Civic Type R: 26mm
1994-2001 Integra LS: 22mm
1994-2001 Integra GSR: 24mm
1996-2001 Integra Type R: 24mm
Rear:
1992-1995 Civic EX: 13mm
1994-1997 del Sol DOHC: 15mm
1999-2000 Civic Si: 13mm
1997-2000 Civic Type R: 22mm
1994-1999 Integra LS: 13mm
2000-2001 Integra LS: 14mm
1994-2001 Integra GSR: 14mm
1996-2001 Integra Type R: 23mm (JDM) 22mm (USDM)
All info is from JDMUniverse.com originally written by user: phunhaus
---------- Post added at 07:50 PM ---------- 6 hour anti-bump limit - Previous post was at 07:39 PM ----------
rear subframe damage looks like this:
not a pleasant sight.. :help: