two new Diamond pistons for Brodix big-block Chevy heads

Diamond has created new domed drag racing pistons for two popular Brodix big-block Chevrolet cylinder heads: the NRC-SR20 and the Head Hunter.

Forged and machined from resilient 2618 aluminum, these new pistons are available uncoated or finished in the Diamond Double Coat. The Double Coat combines a hard-anodized protective barrier etched into the pistons, both inside and out, with a molybdenum skirt coating that insulates it from heat and reduces wear. As these pistons operate in race engines generating 1100 to 1250hp plus nitrous power, the double-coat is a wise precaution.

On the piston crowns the depth of the inlet valve pockets to suit the NRC heads measure 0.360in; the Head Hunter 0.340in. Both pistons accommodate 2.400 inch inlet valves. Because the 1.900in exhaust valves, used in both heads, operate within the combustion chamber no valve pocket provision is necessary.

Included in each kit is a standard ring pack the dimensions of which are 0.043in, 0.043in, and 3mm oil control ring. The placement of the top ring down from the piston crown is 0.260in (NRC-SR20) and 0.300in (Head Hunter). Side gas ports are provided on both pistons. These transfer combustion gases to the inner regions of the top ring grooves, maintain ring contact with the cylinder wall, and promote dependable ring sealing.

In the pin bores two holes lubricate the H13 tool steel piston pins, which are provided with each kit. These holes are connected by an oiling groove which is fed via passages from the oil control ring grooves. The pins are retained in the pin towers by double spiral locks and to combat high operating pressures, the pins boast 0.185in thick walls.
Below each pin boss a rib side-relief is featured. These are integrated into the lower regions of the pin towers and provide crucial support to the piston skirts. Finally, inspired by the popularity of the Brodix heads, these new pistons are covered under Diamond’s “one piston no problem” program.

For more information contact Diamond Pistons, 23003 Diamond Drive, Clinton Township, MI 48035, Telephone (877) 552-2112, visit, or e-mail Mike Panetta at

Wilwood introduces new front disc brake kit for 1979-1981 Camaro/Firebird

Kit features forged billet DynaPro 6 piston differential bore calipers that provide enhanced performance of a larger pad compared to four piston calipers.  DynaPro 6 calipers utilize stainless pistons to resist corrosion and reduce heat transfer from the pads.  Another unique feature is Wilwood’s exclusive Quick-E brake pads retention clips for simplified pad service without caliper removal.

Base kit (P/N 140-12836) comes with HP plain face 12.19” vented rotors and black powder coated (red calipers are optional) 6 piston calipers.  ULHP rotors are smooth face machined from premium grade carbon iron castings to provide true and precise running for the street or track.  Optional SRP performance rotors feature Wilwood’s signature directional drill and slot design with a protective E-coat finish. The drill and slot pattern adds race-tech styling and the venting qualities that preserve pad performance.

Friction is provided by BP-10 compound Wilwood “Smart Pads”. BP-10 is a unique metallic composite formula that provides quiet engagement and low dusting, but with the added temperature range and higher friction values of a semi-metallic compound pad. BP-10 runs clean and quiet on the street, with improved stopping power and fade resistance for tough roads or those fun days at the track. Optional race only pad compounds are also available.

To complete the installation, precision machined and application specific brackets come along with premium grade hardware and alignment shims for a secure and accurate installation. DOT approved flexline kits, required to adapt Wilwood calipers to your chassis plumbing, are available separately.  Contact your local Wilwood dealer for ordering information.

Wilwood performance brake kits are loaded with cutting edge technology built on years of domination in world motorsports, and proven reliable through Zero PPM defect supply to OEM’s.  Wilwood’s Big Brake Kits are designed to meet the high performance demands of today’s tire, wheel and suspension technology.

For more information contact: Wilwood Engineering at (805) 388-1188 and request to speak with Erika Gordillo for marketing issues, or Andy Fritts for technical questions.  Also, Wilwood’s website is accessible at or e-mail