ARP 535-9701 Engine & Accessory Bolt Kit for CHEVROLET Big Block 8740 12pt ymm_46 This spacer with an integrated

This spacer with an integrated catalyzer is designed for O2 sensors with a 45-degree angle

Material: ARP2000/8740 Chrome Moly

It’s important to note that lesser quality studs are not even centerless ground – the material is thread rolled in bar stock form (mostly before heat-treat

Specifications Socket Size(s) 10mm tri-square

ARP 535-9701 Engine & Accessory Bolt Kit for CHEVROLET Big Block 8740 12pt ymm_46 This spacer with an integratedIts easy to assemble a show quality engine when you use ARPs handy Engine & Accessory Fastener Kit. Virtually everything you need comes completely organized in one convenient package (no need to deal with twelve different part numbers)! More importantly, each and every fastener is superior in strength to the OEM bolts, and also significantly better than hardware grades (even Grade 8). You have a choice of two premium quality materials and finishes.