MR-1 Cast Iron Block

$2,995.00 

standard 3" mains

MR-1A Aluminum Block

$4,395.00 

standard 3" mains

Here are just some of the MR-1 Pontiac Block improvements over a stock block:

• made from high quality cast iron
• has a thick deck
• comes standard with splayed billet steel 4 bolt main caps 
• there is no water jacket penetration at the clutch ball 
• block is capable of large bore and stroke sizes
• dual bellhousing bolt pattern
• lifter galley is strengthened - no additional lifter bore brace is required

The aftermarket Pontiac MR 1 block was designed to accept ALL stock Pontiac parts! 

10/01/05 - 50 MM cam bearings - $150.00

10/01/05 - 50 MM cam bearing option! Free upgrade!

2/01/06 - 55 MM cam bearing option! - $150.00 upgrade

2/01/06 - 55 MM cam bearings! - $150.00

2/01/06 - Bronze lifter bushing - upgrade - $360.00 installed

2/01/06 - 4 bolt Front main cap option - $75.00 installed!

2/01/06 - 3.25" main housing bore option - Free upgrade!

3/15/07 - Pro Main Cap option (call for pricing)!

4/15/08 - .937 Lifter bore upgrade - $150.00 (only available with bronze lifter bores)!