OP 1780B Sports Throttle Body: These are precision bored, contoured and polished and fitted with a larger throttle plate to give a good power gain for street and sports use without losing low end response. Price includes refundable $50 core charge.
| OP 1780B | $300.00 |
OP 1568M Sports Cast Aluminum Intake Manifold: This is an actual replacement manifold for the Quad 4 engine where extra power is wanted.Dyno tests have shown this to gain almost 10 HP on some moded engines compared to their stock manifold. This manifold can be used on any Low Output (LD2) to replace the tubular intake or later '92 and up 2.3 engines. Requires t/body spacer (or t/body upgrade) for the tubular manifold replacement.
| OP 1568M | $200.00 | |
| OP 1568M | (with spacer for LD2 t/body) | $225.00 |
OP 1568A Free Flow Air Intake: Fits all 2.3 Quad 4 engines from 87-95. Polished aluminum tube, all fittings, with under hood free flow filter.
| OP 1568A | $175.00 |
OP 1154 Stainless Steel Performance Valves: Highest quality stainless valves to increase flow and reliability for hot street, turbo or racing uses. Fit all HO 2.3 cyl. heads from '89 thru '95.
| OP 1154 | Set of 16 valves | $225.00 |
| OP 1154A | Set of 16 valves-for '87-'89 low output engines | $225.00 |
OP 1567 H.D. High Output Valve Springs: Upgrade or restore your engine to the factory HO spec valve springs. Can be used with up to .410" lift cams. Spring rate of 75-80 lbs installed @ 1.437" and 205 lbs @1.043".
| OP 1567 | Set of 16 | $100.00 |
OP 1519 H.D. NHRA Legal Racing Valve Springs: Conical factory-type single spring that will accomodate up to .440" lift and give a firmer rate for high performance useage. Spring rate of 85 lbs. installed @ 1.437" and 235 lbs. @ 1.000" open.
| OP 1519 | Set of 16 | $275.00 |
OP 1153H Sports H.D. Hydraulic Cam Followers: Special hydraulic lifters (Cam follower buckets) for performance use to increase low end torque and resist high speed pump-up.
| OP 1153H | Set of 16 | $250.00 |
OP 1148 Replacement HO Camshafts: Pair of replacement High Output camshafts to refurbish your HO or upgrade your Low Output engine.
| OP 1148 | 88-94 2.3 engines | $350.00 |
| OP 1148S | 95 only 5 spd 2.3 engines *has power steering hex drive* | $400.00 |
OP 1149 Factory W41 Profile Camshafts: Pair of intake and exhaust cams for all 2.3 engines that have the factory sports profile. They rate at 190 HP in the HO engine with no other mods. They have a duration of 218 degrees @ .050" and .410" lift. These are the best all around street/sports cams to work well with the factory ECM and our sports chip.
| OP 1149 | Pair | $450.00 |
| OP 1149K | Kit w/ OP 1153H Lifters | $650.00 |
OP 2300HL New 2.3 Quad 4 Cylinder Head: Exact Replacement for 94 & up engines. Will also work on any 92 & up LD2 (low output) engine.
| OP 2300HL | $350.00 |
OP 2300HLA Complete head assembly with new valves, springs, seals, etc.
| $650.00 |
OP 2300HE New 2.3 Quad 4 Cylinder Head: Replaces any 87-89 LD2 low output head.
| OP 2300HE | $350.00 | |
| OP 2300HEA | Complete Assembly | $650.00 |
OP 2300HO New 2.3 Quad 4 Cylinder Head: Replaces all 89 -92 HO cylinder heads.
| OP 2300HO | $400.00 | |
| OP 2300HOA | Complete Assembly | $700.00 |
OP 9515 Sports Cylinder Head Gasket Set: Print-o-seal performance head gasket and rest of all gaskets and seals to install a new or refurbished head on your Quad engine.
| OP 9515 | Head Gasket Set | $110.00 |
| OP 9515K | Complete Quad Engine Gasket Set | $200.00 |
OP 1777S Sports Cast Exhaust Manfiold: This machined and ported manifold has shown nice overall power gains in the mid range for the best alternative to tubular headers. This manifold will not rust, crack or leak, and gives better low end power than most header systems will. Comes with all gaskets, hdwe. and heat shields, direct bolt on replacement.
| OP 1777SE | Manifold kit only (For Vin A HO engines through '91 only) | $250.00 |
| OP 1777SL | Manifold w/ big bore downpipe(For all years non HO and '92 & up HO engines) | $325.00 |
OP 1178E Sports Cat-Back Exhaust System: Free up lost power by installing this 2 1/4" mandrel-bent aluminized cat back pipe which includes a resonator eliminator and a Dynomax super turbo muffler with dual stainless tips & hardware.
| OP 1178E | $225.00 |
OP 1530 Sports Power Pulley: This is a smaller diameter steel damper style pulley to increase engine response and give good belt wear and smoothness. Comes with new serpentine replacement belt, too.
| OP 1530 | $195.00 |
OP 1530KSports Power Pulley Kit: This is a smaller diameter steel damper style pulley to increase engine response and give good belt wear and smoothness. Also includes slightly larger aluminum billet alternator pulley to decrease belt drag. Includes new serpentine replacement belt, too.
| OP 1530K | $225.00 |
OP 3199 A/C Eliminator Pulley: This special pulley assembly is a direct bolt on replacement for the stock air conditioner compressor. Fits with stock belt. Reduce weight and drag for more power.
| OP 3199 | $80.00 |
OP 1562S Sports Replacement Cast Pistons: Autothermic cast 10:1 compression ratio HO pistons. Refurbish or upgrade you engine with these pistons. Available in std. and +.020" (.5mm) oversize. Kit comes complete with 4 pistons and new rings and pins.
| OP 1562S | Set | $350.00 |
OP 1562F Forged Performance Pistons: Special High-strength forged aluminum pistons for performance applications in the Quad 4 engines. Available in compression ratios from 8:1 (Turbo/Supercharger applications) up to 13:1 (Full-race applications) Come in complete set of 4 with tool steel pins and racing ring sets. Available in std., +.010" (.25mm) & +.050" (.5mm) oversizes.
| OP 1562F | $650.00 |
OP 1164S Forged Replacement Connecting Rods: Set of four new OEM factory rods and bolts to replace your high mileage units. Sold in set of four only, with steel floater pin design.
| OP 1164S | $250.00 | |
| OP 1164SB | $55.00 | New replacement rod nuts & bolts |
OP 1540 Quad 4 Main Bearing Set: Factory replacement high-quality main bearing set. Available in Std., -.010" and -.020" Sets.
| OP1540 | $75.00 |
OP 1541 Quad 4 Connecting Rod Bearings: Factory replacement high-quality connecting rod bearings. Sold in set of 4 for Std., -.010" and -.020" sizes.
| OP 1541 | Set of 4 | $50.00 |
OP 1539 Quad 4 Main & Rod bearing Set: Includes both the H.D. replacement main and rod bearing sets. Available in std., -.010" (.25mm) & -.020" (,5mm) sizes.
| OP 1539 | Mains & Rod Bearing Set | $120.00 |
OP 1174T Timing Chain Kit: Includes the factory chain, tensioner and guide, plus the three other chain rail guides.
| OP 1174T | $185.00 | |
| OP 1174TK | Kit with Cam & Crank Gears | $225.00 |
OP 1581 H.D. Replacement Oil Pump Assembly: Includes the OEM factory pump assembly and oil pickup housing.
| OP 1581 | $135.00 | |
| OP 1581K | H.D. Oil Pump & Pan (Includes new factory oil pan) | $225.00 |
| OP 1581G | Replacement crank oil pump drive gear | $65.00 |
OP 1580 Quad 4 Crankshaft Kit: This factory original replacment crank is refurbished and comes with new matching main and rod bearing sets. This crank kit fits only the '89 and up Quad 4 engines. Price includes refundable $50 crankshaft core charge.
| OP 1580 | $300.00 |
OP 1131SE Sports Clutch Assembly: This H.D. factory unit was developed for the Olds Firehawk cars and they are a strong and smooth acting clutch that can take a lot of hard driving. Feels and pulls smooth with nice release for street and highway use. Kit includes new pressure plate and disk plus new cover bolts. We do not guarantee good clutch break in and wear unless flywheel is resurfaced at installation. Note: '95 Cavalier, Sunfire, GrandAm & Achieva 2.3 Quad engine ONLY- must use 2.4TC clutch assembly listed in the 2.4 TC engine section.
| OP 1131SE | $325.00 |
OP 1132SE Sports Flywheel: These are custom remachined flywheels that are lighter and rebalanced to better than factory specs to give you improved RPM and shifting smoothness for sports and street driving.Comes complete with new flywheel installation bolts. Price includes $50 refundable core charge. Note: '95 Cavalier, Sunfire, GrandAm & Achieva 2.3 Quad engine ONLY- must use 2.4TC flywheel listed in the 2.4 TC engine section.
| OP 1132SE | $300.00 |
