Crawford CCR 660 Club Racer Heads | EJ WRX/STI

<p><strong>Built for club racing. Behaves on the street.</strong> The <strong>Crawford Club Racer CCR 660</strong> cylinder head service delivers CNC-ported EJ heads for Subaru <strong>WRX/STI</strong> targeting <strong>~520–550 whp</strong> (~660 bhp crank) with the right turbo, fuel, studs, and tune. Expect stable high-lift airflow, clean sealing, and repeatable results—prepped the same way we build heads for our motorsport programs.</p>

<h2>Who It’s For</h2>
<ul>
  <li>EJ-platform WRX/STI builds that have outgrown stock ports and seat geometry</li>
  <li>Track days, time attack, drag, and serious street cars that demand reliability</li>
  <li>Builders who want documented, repeatable clearances and seat work</li>
</ul>

<h2>What You Get (Pair of Heads)</h2>
<ul>
  <li><strong>CNC porting + hand blend</strong> (intake/exhaust) for stable high-lift flow</li>
  <li><strong>Competition multi-angle/radius valve job</strong> matched to cam profile</li>
  <li><strong>R&amp;R 16 bronze valve guides</strong> with new <strong>Viton seals</strong></li>
  <li><strong>OHC bucket lash set</strong> to your cam card (Kelford/GSC/OE)</li>
  <li><strong>Precision resurface</strong> to <strong>MLS-grade</strong> finish for reliable sealing</li>
  <li><strong>Pressure test</strong>, final clean, and assembly with heat tabs</li>
  <li><em>Build sheet</em> with clearances; optional <em>flow sheet</em> add-on</li>
</ul>

<h2>Popular Options (Select at Checkout)</h2>
<ul>
  <li><strong>Valves:</strong> Stainless intake / Inconel exhaust (Manley or Ferrea)</li>
  <li><strong>Springs/Retainers:</strong> Dual spring kit, titanium retainers</li>
  <li><strong>Combustion chamber match:</strong> gasket bore (99.5–102 mm) &amp; deshroud</li>
  <li><strong>AVCS:</strong> single- or dual-AVCS compatibility set by casting/VIN</li>
  <li><strong>Cams:</strong> supply your cams or select recommended profiles</li>
</ul>

<h2>Compatibility &amp; Fitment</h2>
<ul>
  <li><strong>Platforms:</strong> EJ205 / EJ255 / EJ257 / EJ207 (spec by VIN)</li>
  <li><strong>Use:</strong> off-road/competition; professional calibration required</li>
  <li><strong>AVCS:</strong> we configure to your application—note single/dual AVCS at checkout</li>
</ul>

<h2>Recommended Supporting Mods</h2>
<ul>
  <li><a href="/products/arp-625-head-studs-ej">ARP 625+ head studs</a> &amp; <a href="/collections/gaskets-seals">MLS head gaskets</a> (thickness to set quench)</li>
  <li>Fuel system sized to target power; quality <a href="/collections/air-oil-separators">AOS</a>; proper oiling</li>
  <li>Turbo sized for 520–550 whp, intercooler capacity, heat management</li>
  <li>Pro tune; verify boost control, knock control, and temps</li>
</ul>

<h2>Process &amp; Standards</h2>
<ul>
  <li>Race-proven machining and assembly with tight, repeatable tolerances</li>
  <li>Seat/guide geometry matched to cam lift and intended RPM</li>
  <li>Deck finish verified to MLS spec; pressure-tested before shipment</li>
</ul>

<h2>Core, Castings &amp; Lead Time</h2>
<ul>
  <li>Service price is for machine work/assembly. <strong>Does not include castings</strong> unless selected.</li>
  <li>Send your heads or add new OEM castings from the dropdown.</li>
  <li>Small-batch production; <strong>lead times vary</strong>. Low stock moves fast—next batch ETA applies when sold out.</li>
</ul>

<h2>Install &amp; Tuning Notes</h2>
<ul>
  <li>Clean, measure, and verify short-block deck. Mock-up with MLS gaskets and <strong>ARP 625+</strong> studs.</li>
  <li>Confirm lifter/bucket lash on final assembly; follow torque angle and sealant procedures.</li>
  <li>Break-in oil, then fresh oil and filter; re-torque where required; monitor oil/coolant and knock.</li>
</ul>

<h2>In the Box</h2>
<ul>
  <li>Assembled CCR 660 cylinder heads (pair)</li>
  <li>Build sheet with clearances (flow sheet if selected)</li>
</ul>

<h2>Legal</h2>
<p>Competition/off-road use only where applicable. Not CARB-approved. Professional installation and calibration required.</p>

<hr>

<p><strong>Bundle &amp; Save:</strong> Pair CCR 660 with <a href="/collections/short-blocks">Crawford Short Blocks</a>, <a href="/products/arp-625-head-studs-ej">ARP studs</a>, <a href="/collections/gaskets-seals">MLS gaskets</a>, and <a href="/collections/air-oil-separators">AOS</a> for a complete top-end package.</p>