Part Number: L2490NF30. Suggested Piston to Wall Clearance KB Pistons can be installed tighter than other performance pistons. Speed-Pro developed powerforged pistons and set the pace in powerforged technology. The high silicon VMS-75 alloy is found exclusively in pistons powerforged by Speed-Pro. Wash and wax the car. Up to 3,000 tons of force forges aluminum slugs into the basic piston form which creates a grain flow pattern in the structure providing excellent strength, ductility and improved heat dissipation. You can move from light to wild, but in this article we will look at a few major modifications. Depending on the engine size, you can get from 5 to 20 hp additionally. In fact, there is nothing to make a car fashion no one can do these simple weekend improvements. Small-block pistons from different displacements are generally not interchangeable. Other than differences in bore size, the major difference between pistons is the compression height (also called pin height: the distance fromthe centerline of the piston pin to the deck surface of the piston). They've got boosted and nitroused motors pushing over 1200HP on their hypereutectic pistons before reaching failure (the wrist pin area lets go when they reach their structural limits). Piston - Speed Pro - Forged - 4.030 in Bore - 1/16 x 1/16 x 3/16 in Ring Grooves - Plus 3.4 cc - Coated Skirt - Small Block Chevy - Set of 8. That part number is also for SBC 350 engines. Jump to Latest Follow ... .910" pin diameter (all SBC I worked on had .927" pin diameter), 1.607" comp height, 3.721" piston overall height (top to bottom of skirt) and flat top with (4) valve relieves. Cast pistons work quite well, Siv-O-lite, Badger and a few others are good for rebuilds and mild street/strip use. A close fitting piston rocks less, supports the rings better, and seals the engine for maximum power. Manufacturer: Sealed Power. When a loose fit engine is desired the rigid skirt design of the KB Piston allows the builder a choice without fear of piston damage. I can believe that claim- I've certainly never had a problem at the 500-550HP levels I typically don't go above in a small block. Pistons The word is, Speed Pro, aka Federal Mogul pistons, are now made "off shore", like in India now. They are tough little slugs. Believe it or not, cleaning the car and waxing can actually improve the aerodynamics of your car. I say go to E-Bay and you'll find what you need and probably very cheap. MAHLE Industries, Incorporated. Speed-Pro Powerforged Small Block Chevy Pistons View All Speed-Pro Powerforged Small Block Chevy Pistons Sealed Power 350ci Stock Type Pistons, .030" Overbore Piston Dia… 7006P Sealed Power Pistons. sealed power, speed pro, trw are all the same company..... =Federal Mogul. SEALED POWER 423NP Piston ALL THE PARTS YOUR CAR WILL EVER NEED Show Prices In US Dollars ($) Australian Dollars (AU$) Brazilian Real (R$) Canadian Dollars (CAD$) Swiss Francs (CHF) Euros (€) British Pounds (£) Japanese Yen (¥) Mexican Pesos (Mex$) Norwegian Krone (kr) New Zealand Dollars (NZ$) 23030 MAHLE Drive. The pistons are forged with 55-99 on the underside of the head. Thanks to the reduced heating, the engine can breathe more easily, reduce power loss and, most importantly, increase power. Farmington Hills, Michigan 48335 USA. SEALED POWER Engine : Piston Auto Parts ALL THE PARTS YOUR CAR WILL EVER NEED Show Prices In US Dollars ($) Australian Dollars (AU$) Brazilian Real (R$) Canadian Dollars (CAD$) Swiss Francs (CHF) Euros (€) British Pounds (£) Japanese Yen (¥) Mexican Pesos (Mex$) Norwegian Krone (kr) New Zealand Dollars (NZ$) Forged pistons are the best and for higher RPM and more sustained heavy use, they are teh best choice. Office hours: 7:30am - 4:00pm EST. Tech support: +1 800 223 9152 And for higher RPM and more sustained heavy use, they are teh best choice are best! Sustained heavy use, they are teh best choice that part number is also for SBC 350.. Cast pistons work quite well, Siv-O-lite, Badger and a few are. Generally not interchangeable for maximum power light to wild, but in this article we will look a!, Siv-O-lite, Badger and a few major modifications and more sustained use! Generally not interchangeable 55-99 on the engine for maximum power the car waxing... 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