NCRS - Banned
We guarantee Fit, Function & Quality. There is no expressed or implied artificial NCRS cosmetic guarantee; that is guaranteed to change with each new $50-75 "Manuels" publication. And No refund on their old Manuels.



1st Chaparral

74 Greenwood 
Fitch R.I.P.

We Race a C6R

C6R RainDance

 Victorious 70

 69 Racer

67 Racer

 66 Racer

65 Racer

 64 Racer

63 Racer

When they malign,
I reply & out them

Dirtball #238

1SNAKE #8797

Wholittle #32595


Pilot Dan

Furline #53259

2 Queers

Alaska, Hawaii & 



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Fill in you accurate Billing Address. Then under Shipping Address: use YOUR name with OUR ADDRESS 25 Well St. Bridgeport, CT 06604.

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Incomplete or frivolous replies to any question result in cancellation. No third party shipment allowed.


Insurance: is added to all International Shipments & includes the merchandise plus the cost of shipping. This total value may or may not be subject to an import tax in your country. No shipment without Full Insurance.


Very Important: And note the year, convertible, coupe, t-top, engine size 265, 283, 327, 350, 396, 427, 454. And options like Air Conditioning, Automatic, PS, PB, PW, etc.     


Note: there is a $4.00 fee added to International shipments because of the necessity of export documents; the USPS required immediate payment & we must delivery to the Post Office.


It is, whatever the carrier charges! Note that shipping 1 lb. to Canada with insurance is approximately $25-35. Shipping 1 lb. to Europe with insurance is approximately $30-40. Shipping 1 lb. to Oz with insurance is approximately $35-45. We DO NOT ship without insurance - because uninsured ones are "lost" or stolen by insiders.

1967-1974 Corvette Big Block 427/454 Exhaust Manifold Bolt Genuine GM 3909821 NOS

Price: $0.00
Out of stock
Item Number: 8995403

1967-1974 Corvette Big Block Exhaust Manifold Bolt Genuine GM 3909821 NOS now SOLD OUT

CAVEAT EMPTOR: made in the USA; not reproduction; not imported. This is special shouldered bolt with distorted threads for an interference fit that resists loosening.

NOTE: these have the a current head marking: six raised radial strikes surrounding the ILT logo. Seven pieces only.

USAGE: There is controversy regarding their usage: some say only the 2 end bolts on both manifolds use these flanged bolts; thus 8 per big block. (Note: flanges negate the use of Exhaust Bolt French Locks, however these bolts are theoretically self locking.) The other School of Boltoligist claim they were used on all positions; thus 8 per big block. Practically they can be used on any 1965-1974 396/427/454 fat block with original manifolds.

1967 1968 1969 1970 1971 1972 1973 1974

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