Sgi Forged 4340 Steel Crankshafts Pontiac 400 4.210" 4.250" 4.500 & 461/488 Kits on 2040-parts.com

SGI Forged 4340 Steel Crankshafts for Pontiac 400 4.210" 4.250" 4.500" & 461/488 Kits

By Choosing a SGI Crankshaft marked with P/N C3-400P, you’ll receive one of the finest high performance crankshafts on the market available today. Star Galaxy Inc crankshafts dominate the industry when it comes to precision CNC’d crankshafts. Utilizing only daily calibrated state of the art CNC equipment, working in unison along with extremely high qualified master craftsmen, SGI crankshafts has incorporated all the precision and detail with high production capabilities in a mass array of applications and designs. SGI C3-400P series crankshaft is features: 4340 AQ Chromalloy steel non-twist forgings; Multiple stage heat treatments; X-rayed; Magnafluxed and Sonic tested; Completely CNC machined with a two step micro polishing on the journals; Oil passages are cross drilled; Crankshafts are plasma nitride to a minimum depth of 0.060; 3D exclusively designed arrow counterweights and gun drilled mains for 20% less crankcase windage than our competitors. 1 inch lightening holes in all 4 rod throws reduces rotating mass and helps eliminate the need of Mallory when balancing.    

Customer Service: 1-626-839-5700, or get questions answered at stargalaxyinc.com

Multiple Parts listed under item, Note us part number when ordering please, or we'll delay to ship until you note us the part number.

Each unit is marked with a assigned part number of C3-400PC, then gets well packed in a stronger carton box with triple layer of wall, at a size of 30” X 7.5” X 7.5”, with a shipping weight of 80 lbs. Weights and dimensions are for reference only, actual data may vary. Prices are based from our California warehouse (zip code 91789), and subject to change without prior notice. Check part number and specifications first before ordering. Most orders will be shipped within 24 hours. 

The following chart may help, for reference information only, on other components connecting to the crankshaft you interested:

Choice A - Assembling Kits  AK3-461 or 488:  SGI rotating kit includes AK3- assembled combo of SGI forged 4340 steel crankshaft, SGI forged 4340 steel H or I beam rods with ARP 2000 cap screw bolts, forged aluminum pistons & Moly rings. Special requests may require 2 weeks to hit your door and must be prepaid, to insure receipt of your kit(s).

Notes on Forged 2168 High Strength Alloy Pistons: FTP - Flat Top, DTP - Dome, RDP - Reverse Dome, DIP – Dish Top, C/H - Chamber High, T/V - Top Volume, C/R – Compression Ratio

KIT NUMBER	Crankshaft	SGI Rods	PISTON	BORE		C/H	T/V	COMPRESSION RATIO				PIN	RINGS	PRICE
									78cc	87cc
AK3-455 FTP1	C3-400PA  4.210	R3-6625 H	14722	20	4.171	1.485	-5.50cc		11.62	10.08		.980X2.750	3150032	1690
				30	4.181				11.66	10.12
AK3-455 FTP2	C3-400PAC 4.210	R3-6635 H	14722	20	4.171	1.485	-5.50cc		11.62	10.08		.990X2.750	3150032	1690
				30	4.181				11.66	10.12
AK3-461 FTP	C3-400PB 4.250	R3-6800 H/I	14838	35	4.155	1.295	-5.50cc		11.65	10.11		.990x2.500	3150032	1690
				65	4.185				11.78	10.23
AK3-461 RDP	C3-400PB 4.250	R3-6800 H/I	14850	35	4.155	1.295	-21.7cc		10.02	8.94		.990x2.500	3150032	1690
				65	4.185				10.14	9.05
AK3-488 FTP	C3-400PC  4.500	R3-6800 H/I	14842	35	4.155	1.170	-5.50cc		12.27	10.64		.990x2.500	3150032	1690
				65	4.185				12.42	10.77
AK3-488 RDP	C3-400PC  4.500	R3-6800 H/I	14856	35	4.155	1.170	-21.7cc		10.02	8.94		.990x2.500	3150032	1690
				65	4.185				10.14	9.05

 

Choice B - Balanced Assembling Kits - Plus $600: By choosing SGI completely assemblies, spun and balanced by extremely highly qualified master craftsmen, you’ll receive one of the finest stroke kits available today. Just extra $600 (you’ll finally balance it anyway), get a whole kit internally balanced, along with STD main bearings, H-series rod bearings, SFI steel damper, and SFI flexplate.

Shipping cost on kit will be around $130 nationwide.

We accept Visa / Master cards, and PayPal payment. Will call is available for a fee.

Please read and understand the listing before committing to buy it now.

It’s buyer’s responsibility to check the sizes and specifications of all parts for application(s) before ordering. Orders which are qualified will be shipped out after payment clears. All goods ordered and shipped are on final and not subject to exchange or return.