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K20A / K20Z - 8620 Steel Billet CAMSHAFTS
The newest engine in the Honda tuning community. The "K Series" is Honda's mass produced version of the roller rocker valve train assembly found in the S2000. Less friction, more rpm potential, faster action cam profiles...this engine has untapped potential. First introduced in the JDM Integra Type-R in 2001, this engine put out a respectable 220HP @ 8000 rpm straight from the factory (DC5). The K20A also sees service in the JDM Civic Type-R, using the same compression and cam profiles. The first USDM production model was the K20A2 found in the 02-04 RSX-S. Other engines featuring the same head configuration include the K24A2 (TSX) that features a 9.114" deck height, the K20Z1 in the 05-06 RSX-S that includes various JDM Type-R add-ons like cams, throttle bodies, higher compression and Honda's answer to the tuning crowd, the K20Z3 found in the 2006-up Civic Si.

After years of high end race and dyno testing, BC has released a line of 8620 steel billet camshafts that deliver the ultimate in high performance. Made from aerospace grade, 8620 steel billet material and CNC ground on state-of-the-art cam grinders, these BC cams deliver the utmost in rigidity at extended rpm range while reducing possible valve float. These are the best cams money can buy and are now available for all stages, including the popular Stage 2 all motor profile.

Stage

Description

Part#

Adv. Dur.

Dur @ .050

Lift (in)

Lift (mm)

Kit#

Cam Card

Dyno

Shop

Status

Small Turbo Profile w/Short Duration
Hot track/strip or road race spec for smaller turbo size wheel applications. Requires kit BC0040 or BC0040S.

BC0041-2

296°/300°
252°/252°
246°/246°

222°/224°
186°/186°
178°/178°

.520"/.497"
.357"/.357"
.313"/.313"

13.21/12.62
9.07/9.07
7.95/7.95

BC0040

In-Stock

All Motor Track and/or High Boost Turbo
Hot track/strip or road race spec for N/A applications or fully built, high boost, turbo race spec. Requires kit BC0040 or BC0040S.

BC0042-2

304°/300°
252°/252°
246°/246°

234°/228°
186°/186°
178°/178°

.525"/.472"
.357"/.357"
.313"/.313"

13.34/11.99
9.07/9.07
7.95/7.95

BC0040

In-Stock

Normally Aspirated Specification
Intended for fully built engine. Extensive modifications, high compression pistons. Also works on K24 all motor. Requires kit BC0040 or BC0040S.

BC0043-2

314°/300°
256°/256°
250°/250°

250°/244°
190°/190°
184°/184°

.525"/.518"
.369"/.369"
.323"/.323"

13.34/13.15
9.37/9.37
8.20/8.20

BC0040

In-Stock

Single Lobe Specification
BC0042-2 with the outer lobes ground off, requires a VTEC killer type rocker arm setup.

BC0042

304"/300"

234"/228"

.525"/.472"

13.34/11.99

BC0040

In-Stock

Single Lobe Specification
BC0043-2 with the outer lobes ground off, requires a VTEC killer type rocker arm setup.

BC0043

314"/300"

250"/244"

.525"/.518"

13.34/13.15

BC0040

In-Stock

USDM K20A2 (RSX-S)

Stock

302°/305°

219°/215°

.483"/.431"

12.27/10.95

USDM K24A2 (TSX)

Stock

310°/302°

210°/212°

.451"/.453"

11.45/11.50

JDM K20A (DC5)

Stock

320°/318°

224°/219°

.483"/.424"

12.27/10.77

Rocker Ratio: 1.75:1 mid, 1.7:1 sec, 1.7:1 pri.

Note: BC0042 and BC0043 ductile iron cam cores have been replaced with 8620 steel billet cam cores. Please see below for BC0042-2 and BC0043-2 specs and pricing.

No valve timing events due to variable intake cam. WARNING: If running a late model cylinder head (after 2004), you may need to purchase BC2940 keepers to accommodate the BC2010 or BC2011 retainers. Honda changed the keeper groove angles, therefore your stock keepers/locks may not fit the BC retainers properly causing potential damage.

619.749.9018 ph
619.749.9128 fx

WARNING: This product can expose you to chemicals, including Chromium (hexavalent compounds), lead and lead compounds, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov