They regularly hit 240bhp with the mods listed, as firas says seem some do 249bhp and one did 252bhp.
Yeah they do, but there's lots of variables. Im just going on personal experience.
Check out this list, i know its K20A, but theres not really a big difference once youve changed a few of the bolt-on's.
K20A - N/A Combinations without Cams:
Mikegsi - 262.2bhp, 181ft/lb torque. Toda mani, gruppem, rbc, spoon tb, kakimoto regu 06&r, hondata heatshield, earthing kit, grounding position moved, shiny bits
Zero7 - 262 (I think)
Davy 01cw5 - 261bhp 180lb/ft (proven)
monz - 261 (approx.)
LeeH 260.8bhp 179.7lb/ft TDi North 26/11/07 BC Spec IV, BC Mani, RBC Intake, GruppeM, KPRO, Spoon socks
C&S Evo 7 - 260.6
DC5Dub07 - 255.3BHP 169.9 lb/ft torque Ai Autosports NI - Kpro, Gruppe M, RBC, DC sports header, 5ziegen catback.
Rob84 - 254bhp, 172.9lb/ft - Unit 8 mapped, K-Pro, RBC with Hondata inlet gasket, Gruppe M, BC Pro Spec cat-back
jay82 - 253.3bhp (162.8 lb/ft torque) Ai Autosports 4/03/10 - Kpro, GM, RBC, DC sports header, mugen twinloop
Mark_teg - 253.2bhp (168 lb/ft) - Eightspeed 20/07/10 - Kpro, GruppeM, RBC with Hondata gasket, DC header, Spoon B-pipe, OEM Backbox
Neil_integra - 253hp (179lb/ft torque) 19.02.08 Kpro, Mugen manifold, mugen sports cat, mugen twinloop, AEM CAI, skimmed head, toda high compression head gasket, hondata intake manifold gasket, RBC intake + 440 injectors.
Lockwood77 - 252.9bhp (174.6 lb/ft), TDi North, 6/4/09 - GruppeM, J's TB, RBC, Hondata heatshield gasket, Toda exhaust manifold and cat-back
JCW - 252bhp (185.1 lb/ft torque) Kpro, GruppeM, Mugen Mani, Mugen exh, RBC, J's tb
Mikegsi - 251 (192 lb/ft torque too!!)
Turbo5 -250.9bhp (170.9lb/ft) Dasteck Mark @ unit 8. 4/5/10 Kpro, Gruppe M, Mugen manifold with Mugen sports cat, RBC intake, hondata heatshield gasket, Toda exhaust.
celox performance - 250 (178 lb/ft torque) Kpro, ITG Maxogen, BC Header, RBC
Jayk "DC5 3 - 250hp (177 lb/ft torque) - Fujita F5, Toda Mani, Supersprint B-pipe, OEM Back Box, KPRO
Zen1 - 250bhp (171.2 lb/ft torque) Kpro, GruppeM, Piper 4-2-1 Mani +sports cat J's 60RS Catback, RBC, Hondata Gasket, TDI North 14/12/09
BENNY 249.2 BHP (178 LB TORQUE) KPRO, RBC, DC SPORTS MANI, HKS SILENT CATBACK, AEM V2 AND THATS IT! NO MORE!
p_r_e - 248 (159 lb/ft torque)
Jayk DC5 2 - 248 (180 lb/ft torque) Gruppe-M, Toda Mani, Toda Exhaust, Kpro
webbie - 247 (199 lb/ft torque)
tron2k3 - 245.9 (175 lb/ft torque) KPro, GruppeM, Toda Mani, Toda Exh - TDi North 10/12/2007 Time:11:45:33
Integradan - 245.1bhp (165.8 lbft) Kpro, J's Racing CAI, DC Sports Mani, Unknown JDM Exhaust - TDi North (12.06.09)
The Mofo - 244.4 (170lb/ft torque) Kpro, Injen CAI, Toda Mani, Fujitsubo Legalis R cat back -
sydney- 242.7hp 223 whp (166lb/ft) proven. mugen n1 ecu, gruppe m, rbc with hondata heatshield, hks sparks, dc sports mani, j's racing exhaust (one that looks like toda)
TDI North 25/02/08
12T - 242.4 (170.3 lb/ft torque)
stoddie - 242.1 (164.8 lb/ft torque)japerformance. GruppeM, twin loop, rbc, maxim works manifold
milano_chris - 241.7 (170.4 lb/ft torque) KPro, GruppeM, Toda Mani, T1R 63mm cat-back - TDI North 18/10/07
Sinbad - 241.3 (171.7 lb/ft torque) Kpro, GruppeM, DC Mani, Apexi N1 - TDI North 02/11/07
BadBadtz - 241.2 (166 lb/ft torque)
linzi94 - 240.6 aem cai, full spoon n1
Newty: 240hp/168torque, TDI North 23/02/09...KPro, Toda Mani, BuddyClub Exhaust, GruppeM...
Jimmi27- 233.7 (170.5lbft) KPro, Mugen/5zigen, HKS cat back. System-R 2/5/2007
Gaz DC5 - 231.3 (168.3lbft Torque) TDI 11/9/09. Mugen N1 ECU, RBC inlet with Hondata Gasket, Spoon 4-2 & 2-1, ITG drop in filter
Newty - 230 (167.3 lb/ft), TDI North 25/6/08, KPro, Toda Mani, Powerflow CAT back, GruppeM...to follow, proper exhaust(!), RBC intake...more fidling!!!
Jayk "DC5 1- 225 (165 lb/ft torque) - K&N Panel Filter, Toda Mani, Spoon B Pipe
jay82 - 224.2hp (162.47 lb/ft torque) paul from tdi north at elite - Kpro, GM, RBC, mugen twinloop
Garytc78 - 224 (152 lb/ft ) - AEM V2 mugen twin loop awesome gti 27th Sep 2008
Gaz1- 222.8 (148.7 lb/ft torque)
Frank - 221 (156lb/ft torque)
Stuart_M - 220.3 (158.4lb/ft torque) DC Sports cat back. TDI 04/07
Dazza - 219.0(160.8 lb/ft torque)
gaz3434 - 218.2 (156.0 lb/ft torque) - stock except for Spoon drop-in filter!
RSX Type S - 215