The Sanderson CS12 is a small block Chevy conversion header for V8 engine swaps in two wheel drive (2WD) Chevrolet S-10 truck and Blazer (including GMC S-15) applications. The CS12 is a very compact header design that fits cleanly between the engine and frame rail. This is NOT a fenderwell exit header!
The CS12 features a 1-5/8″ primary tube and 3″ collector for applications making more power than the standard 1-1/2″ CS11 header can handle. A 1-3/4″ version is also available, part #CS13.
- The CS12 header works with virtually all engine swap kits.
- Straight Plug cylinder heads ONLY
- For angle plug cylinder heads, order CS11AP or CS11AP134
WARNING: The vehicle’s steering shaft will run between the engine block and header on this application. The use of solid motor mounts, engine plates, or the installation of a torque limiter is strongly recommended to prevent the engine from shifting would may cause the steering to bind.
Comes with all hardware necessary for installation.
Engine : Small Block Chevy 265-400
Primary Tube Diameter : 1-5/8″
Collector Diameter : 3″
Weight : 17 LBS / 7.71 KGS
- 16-Gauge Primary and Collector Tube Thickness
- 3/8″ Thick Flange
- Patented Flange Design Requires NO Gaskets
- Tightest Fitting Header Available Anywhere!
- Made in the USA
- Header Bolt Set
- Collector Reducer Set
Sanderson’s Ceramic Coating is recommended for every vehicle application and is the default finish selection choice above. To meet high standards of quality, Sanderson applies a multi-layer inside and outside aluminized ceramic coating in-house and then polishes the coating to a high luster. This aerospace and military-grade technology adds excellent protection to your headers, while offering the benefit of thermal control in your engine bay. It also improves cylinder scavenging of exhaust gases, and increases the longevity of your header investment.
When sitting in driver’s seat and engine in front of you, the LEFT header would be the Driver’s Side on LH drive vehicles; coincidentally, means the RIGHT header is on the passenger side. See the detail image above left that describes engine sides.
NOTE: Image graphic is generic and not exact representation of product.
|Weight (Lbs / Kg)
||17 / 7.71
What is a D-Port?
We often see confusion in what is considered a D-Port cylinder head. The problem originates in the technical understanding of what constitutes a true D-PORT versus a D-shape. The D-Port roof extends well above the centerline of the exhaust port, whereas the D-shaped port fits nicely inside what is deemed a standard port dimension.
NOTE: This issue concerns STRAIGHT PLUG Vortec-style cylinder heads
Vortec style (and this includes non-GM aftermarket) cylinder heads use a different spark plug spacing on the center two spark plugs. Many exhaust headers will require specific dimpling to ensure adequate spark plug clearance when used with the Vortec-style heads.
If unsure, please measure the center-to-center distance between the center pair of spark plugs on your heads. The standard distance is 4.5″ (11.43 cm) versus 4.0″ (10.16 cm) on the Vortec heads. See image below:
Limited 5 Year General Warranty
Sanderson Street Rod Headers strives to supply our customers with the highest quality parts and service available in the street rod industry. In keeping with this, we warrant and will repair or replace, at our option after inspection in our facility, any of our products which are found by us to have failed due to defects in either material or workmanship. This warranty is activated by the return of the Warranty Card enclosed with every pair of headers, and is effective for FIVE YEARS * from the date of purchase as indicated on the original invoice.
This Warranty does not cover products that fail due to improper motor tuning, alteration, disassembly, or damage caused by racing, misuse, neglect, abuse, improper installation and/or accident, or when used on applications for which they were not designed or approved. We are specifically not responsible for the costs of removal, installation, transportation, destruction of other components, inconvenience, loss of time, or other personal damages, or for any other associated costs including the application of aftermarket coatings applied by others. Sanderson Street Rod headers shall not be liable for any and all consequential damages occasioned by the breach of any written or implied warranty pertaining to this sale in excess of the purchase price of the product(s) as found on the original invoice.
WRAPPING HEADERS WITH THERMAL TAPE VOIDS WARRANTY.
* Extremely compact header designs which locate the collector in close proximity to the exhaust ports are very sensitive to engine tuning. Improper air/fuel mix or timing of ignition and/or valvetrain can cause early failure due to excessive heat. For this reason, part numbers CC2 and CC3 are offered with a two-year Warranty period only. All other Warranty conditions apply.