If you have aftermarket connecting rods with an ARP bolt, please use the chart below to contact the rod manufacturer for the stretch/torque value. The calculation of those values is solely up to the rod manufacturer.
| Rod Manufacturer | Tech Support # | Website |
|---|---|---|
| Argo | +61 (02) 4934 7099 (Australia) | ArgoRace.com.au |
| Arrow Precision | +44 (0) 1455 234200 | ArrowPrecision.com |
| Bill Miller | +1 (775) 887-1299 | BMEltd.com |
| Brian Crower | +1 (619) 749-9018 | BrianCrower.com |
| CAT | +1 (626) 330-1999 | Catpep.com |
| Callies | +1 (419) 435-2711 | Callies.com |
| Crower | +1 (619) 661-6477 | Crower.com |
| Dyers | +1 (815) 657-9970 | DyersRods.com |
| Eagle | +1 (662) 796-7373 | EagleRod.com |
| EARP Machine | +1 (928) 428-3835 | |
| GRP | +1 (303) 935-7565 | GRPConRods.com |
| Howards Cams | +1 (920) 233-5228 | HowardsCams.com |
| K1 Technologies | +1 (440) 497-3100 | K1Rechnologies.com |
| Lunati | +1 (662) 892-1500 | LunatiPower.com |
| Manley | +1 (732) 905-3366 | ManleyPerformance.com |
| MGP | +1 (719) 219-3107 | MGPConnectingRods.com |
| Molnar Technologies | +1 (616) 940-4640 | |
| Ohio Crankshaft | +1 (937) 548-7113 | OhioCrank.com |
| Oliver | +1 (616) 451-8333 | OliverRacingParts.com |
| Pauter Machine | +1 (619) 422-5384 | Pauter.com |
| R&R Machine | +1 (941) 621-8143 | RRConnectingRods.com |
| Saenz | +1 (305) 602 0283 | SaenzGroup.net |
| Scat | +1 (310) 370-5501 | ScatCrankshafts.com |
| SoCal Diesel | +1 (661) 775-5620 | SoCalDiesel.com |
| Spool Imports | (07) 5645 1333 | SpoolImports.com |
| Swanson | +1 (574) 858-9406 | SPMTitaniumRods.com |
| Wagler Competition Products | +1 (812) 636-0391 | email Wagler |
| Wossner | +1 (865) 862-5264 | WossnerPistons.com |
| ZRP Europe | +30 2108251640 | ZRP-rods.com |