Are you ready to purchase race parts to modify your car? I recommend a race part shop online. http://www.maxspeedingrods.co.uk/, where you can find reasonable conrods,crankshaft, turbocharger, suspension coilovers, intake & exhaust manifold, ignition coils,etc.

Type：4340 EN24 H-Beam Connecting Rod
Quantity：4 Pieces as a set
Bolts：Including ARP 2000 bolts
Bolts size：Genuine ARP 2000 3/8" bolts
Lubricants：Including ARP Ultra Torque Assembly Lubricants
Tolerance：Balanced to +/- 1 gram in set
Note：Extra cost for upgrading to ARP L19 bolts
Warranty：Limited lifetime Warranty

detail: http://www.maxspeedingrods.co.uk/high ... -arp-connecting-rods.html